NHS Information Authority - Medical glossary Banner Graphic for the Alphabetical Search
*
*

Home

*
*
*
*
*

How to use the glossary

*
*
*
*
*

General terms

*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

Body system terms

*

Musculoskeletal system

*
*

Skin and subcutaneous tissue

*
*

Blood, and the circulatory system

*
*

Nervous system

*
*

The eyes

*
*

The ears

*
*

Respiratory system

*
*

Digestive system

*
*

Urinary system

*
*

Endocrine system

*
*

Reproductive system

*
*
*
*
*
*

Diseases & Procedures

*

Diseases

*
*

Procedures

*
*
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
*

Terms starting with S:

*
*
*

sacral nerves   

(say'kral)
five pairs of nerves leaving the spinal column in the sacral area.

Body system terms : Nervous system

*
*
*

sacrum   

(say'krum)
broad, flat, triangular-shaped plate of bone formed by five fused vertebrae; the sacrum is located between the pelvic bones with the lumbar vertebrae above and the coccyx below.

Body system terms : Musculoskeletal system

*
*
*

salivary glands   

(sa-ly'ver-ee)
oral glands which secrete saliva to start chemical digestion and to moisten food to facilitate swallowing.

Body system terms : Digestive system

*
*
*

scapula   

(skap'yoo-lah)
large flat triangular bone; also called the shoulder blade.

Body system terms : Musculoskeletal system

*
*
*

sclera   

(skleer'a)
the tough, white outer coat of the eyeball, continuous with the cornea .

Body system terms : The eyes

*
*
*

-scopy   

(-skop-ee)
inspection, examination
e.g. cystoscopy = inspection of urinary bladder with a cystoscope.

General terms : Suffixes

*
*
*

scrotum   

(skroh�tum)
pouch which contains testes and accessory structures.

Body system terms : Endocrine system

*
*
*

scrotum   

(skroh�tum)
two-compartment pouch of tissue located externally on the male body; contains the testes.

Body system terms : Reproductive system

*
*
*

sebaceous glands   

(seb-ay�shus)
glands which secrete oil (sebum).

Body system terms : Skin and subcutaneous tissue

*
*
*

semen   

(see�men)
thick white fluid which contains sperm and other secretions.

Body system terms : Reproductive system

*
*
*

semi-   

(sem-i-)
half
e.g. semilunar = half moon shaped bone of hand.

General terms : Prefixes

*
*
*

semicircular canals   

three bony canals of the inner ear concerned with the maintenance of balance.

Body system terms : The ears

*
*
*

semilunar cartilages   

(sem'ee-loo'ner)
two crescent shaped cartilages in the kneejoint.

Body system terms : Musculoskeletal system

*
*
*

seminal duct   

(sem�i-nul)
one of two channels which convey semen.

Body system terms : Reproductive system

*
*
*

seminal vesicle   

(sem�i-nul ves�i-kl)
one of two small pouches attached to the bladder which join with the seminal ducts to form the ejaculatory ducts.

Body system terms : Reproductive system

*
*
*

sensory nerve   

a nerve which perceives sensations such as pain, touch, and pressure, and conducts them towards a centre (an afferent nerve).

Body system terms : Nervous system

*
*
*

sensory perception   

recognition of sensation such as pain, touch, pressure or temperature change.

Body system terms : Skin and subcutaneous tissue

*
*
*

septum   

(sept'um)
heart muscle which separates the right and left sides of the heart.

Body system terms : Blood, and the circulatory system

*
*
*

sigmoid colectomy   

(sig'moyd col-ekt'oh-mee)
surgical removal of the sigmoid colon.

Diseases & procedures : Procedures

*
*
*

sigmoid colon   

(sig'moyd koh�lon)
S-shaped terminal part of the descending colon, leading to the rectum.

Body system terms : Digestive system

*
*
*

sinusitis   

(sy-nyoo-sy'tis)
inflammation of the membrane lining the facial sinuses caused by infection, usually spread from the nose.

Diseases & procedures : Diseases

*
*
*

skeletal muscle   

(skel'it-ul)
striated muscle which is attached to bone.

Body system terms : Musculoskeletal system

*
*
*

skeleton   

bony framework of the body.

Body system terms : Musculoskeletal system

*
*
*

skin   

the body covering.

Body system terms : Skin and subcutaneous tissue

*
*
*

skin biopsy   

(by'op-see)
surgical procedure in which a sample of skin tissue is removed for microscopic examination in a laboratory.

Diseases & procedures : Procedures

*
*
*

skin graft   

the transfer of a piece of skin, usually a person�s own but occasionally from a donor, from one area of the body to another.

Diseases & procedures : Procedures

*
*
*

small intestine   

see intestine, small .

Body system terms : Digestive system

*
*
*

smooth muscle   

voluntary muscle tissue which lacks cross-striations on microscopic exam; found in areas such as the gastrointestinal tract, respiratory tract and uterus.

Body system terms : Musculoskeletal system

*
*
*

-spasm   

(-spaz-um)
involuntary contraction
e.g. enterospasm = intermittent, painful intestinal contractions.

General terms : Suffixes

*
*
*

sperm motility   

ability of male germ cells to move about.

Body system terms : Reproductive system

*
*
*

sperm; spermatozoon   

(spur-ma-toh-zoh�on)
male germ cell; plural: spermatazoa.

Body system terms : Reproductive system

*
*
*

spermatic cord   

(spur-ma�tik)
tubal passageway by which the testis is suspended in the scrotum.

Body system terms : Reproductive system

*
*
*

sphincter of Oddi   

(sfink'ter)
the sheath of muscle fibres which controls the flow of fluids from the ampulla of Vater into the duodenum.

Body system terms : Digestive system

*
*
*

spinal cord   

(spy'nul)
the major pathway for transmission of nerve impulses between the brain and parts of the body; the spinal cord extends about 45 cm from the base of the brain down the spinal canal.

Body system terms : Nervous system

*
*
*

spinal nerves   

(spy'nul)
the 31 pairs of nerves that arise from the spinal cord and emerge between the vertebrae.

Body system terms : Nervous system

*
*
*

spine   

the spinal column or vertebral column.

Body system terms : Musculoskeletal system

*
*
*

spleen   

(splee-n)
a large lymphoid organ located in the left upper abdomen behind the stomach; plays a role in lymphocyte production and in the destruction and possibly the storage of red blood cells.

Body system terms : Blood, and the circulatory system

*
*
*

splenic flexure   

(splen'ik flek'shur)
a bend in the colon at the junction of the transverse colon and descending colon.

Body system terms : Digestive system

*
*
*

spondyl-   

(spond-il-)
(to do with a) vertebra or the spinal column.

General terms : Root words

*
*
*

sprain   

(sprayn)tearing or stretching of the ligaments that hold together the bone ends in a joint, caused by a sudden pull.

Diseases & procedures : Diseases

*
*
*

stapedectomy   

(stay-pi-dekt'oh-mee)
replacing a diseased stapes (stirrup bone) within the ear.

Diseases & procedures : Procedures

*
*
*

stapes   

(stay�peez)
one of the three auditory ossicles; stirrup-shaped.

Body system terms : The ears

*
*
*

sternum   

(stir�num)
the breastbone.

Body system terms : Musculoskeletal system

*
*
*

stomach   

(stum'uk)
the saclike organ between the oesophagus and duodenum, which acts as a reservoir for food while digestive enzymes and hydrochloric acid act on it.

Body system terms : Digestive system

*
*
*

-stomy   

(-stom-ee)
creation of an artificial opening
e.g. cystostomy = creation of an opening through the abdomen into the urinary bladder.

General terms : Suffixes

*
*
*

striated muscle   

(stree�ay-ted)
any muscle whose fibres are divided into cross striations; responsible for the movement of bones; also known as voluntary muscle.

Body system terms : Musculoskeletal system

*
*
*

sub-   

(sub-)
under, beneath, below
e.g. subclavicular = beneath the clavicle.

General terms : Prefixes

*
*
*

subclavian artery   

(sub-klay�vee-an)
large vessel which branches off the aortic arch on the left and the brachiocephalic trunk on the right to supply blood to areas of the trunk, head and upper extremities; also known as the innominate artery.

Body system terms : Blood, and the circulatory system

*
*
*

subcutaneous tissue   

(sub'kew-tay'nee-uss)
tissue directly beneath the dermis.

Body system terms : Skin and subcutaneous tissue

*
*
*

sublingual glands   

(sub-lin'gwal)
salivary glands below the tongue.

Body system terms : Digestive system

*
*
*

submandibular glands   

(sub-man-dib'yoo-ler)
salivary glands on the inner side of the lower jaw.

Body system terms : Digestive system

*
*
*

submucous resection   

(sub-myoo'kus ree-sek'shun)
an operation to relieve nasal obstruction by removing displaced cartilage and bone from underneath the mucous membrane of a deviated nasal septum.

Diseases & procedures : Procedures

*
*
*

super-, supra-   

(soo-pur-, soo-prah-)
above, beyond, superior
e.g. suprarenal = above the kidney.

General terms : Prefixes

*
*
*

superficial   

(soo'per-fish'ul)
referring to or closer to the surface.

General terms : Views of the body

*
*
*

superior   

(soo-peer'-ee-or)
situated above.

General terms : Views of the body

*
*
*

superior canaliculus   

(kan-ah-lik'yoo-lus)
tube-like structure running within the upper eyelid , parallel to the lid margin.

Body system terms : The eyes

*
*
*

superior oblique   

(ob-leek')
muscle of the eye which works together with other eye muscles to move the eye in horizontal and vertical gaze.

Body system terms : The eyes

*
*
*

superior rectus   

(rek'tus)
muscle of the eye which works together with other eye muscles to move the eye in horizontal and vertical gaze.

Body system terms : The eyes

*
*
*

superior vena cava   

(vee'ner kay'ver)
main vein that drains blood from the head, neck, upper limbs and thorax and enters the right atrium of the heart .

Body system terms : Blood, and the circulatory system

*
*
*

supination   

(soo'pin-ay'shun)
the act of turning the hand so that the palm is uppermost.

General terms : Movements of the body

*
*
*

sweat glands   

glands located in the dermis that release sweat onto the skin through pores or hair follicles.

Body system terms : Skin and subcutaneous tissue

*
*
*

sym-, syn-   

(sim-, sin-)
with, along, together, beside
e.g. syndactylism = fusion of two or more fingers or toes.

General terms : Prefixes

*
*
*

sympathetic nervous system   

portion of the autonomic nervous system that leaves the central nervous system at the thoracolumbar region and prepares the body for "fight and flight" in exciting or stressful situations, increasing adrenaline and norandrenaline secretion; see also parasympathetic nervous system.

Body system terms : Nervous system

*
*
*

synarthrosis   

(sin-arth-roh'sis)
a fibrous joint.

Body system terms : Musculoskeletal system

*
*
*

synovial fluid   

(sy-no'vee-al)
thick, colourless fluid that surrounds and lubricates a synovial joint.

Body system terms : Musculoskeletal system

*
*
*

synovial joint   

(sy-no'vee-al)
a freely movable joint - the ends of the bones forming the joint are covered with thin layers of cartilage and the bones are linked by ligament lined with synovial membrane; also known as a diarthrosis.

Body system terms : Musculoskeletal system

*
*
*

synovial membrane   

(sy-no'vee-al)
lining of the joint capsule which secretes lubricating synovial fluid.

Body system terms : Musculoskeletal system

*
*
*

systemic circulation   

(sis-tem�ik)
the circulation of blood from the left ventricle of the heart via the aorta to all parts of the body and back to the right atrium via the venae cavae.

Body system terms : Blood, and the circulatory system

*
*
*

systole   

(sis'toh-lee)
the contraction stage of the cardiac cycle.

Body system terms : Blood, and the circulatory system

*
*
*
*
*
Search:
*
To search for a term, please access the online version of the Glossary.

Back To Modules
*
*
*
*
*
* *
*
*

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z