Category: S

An operation in which a portion of the sclera (the outer white layer of the eyeball) is removed. Surgical removal of the sclera. Surgical excision of damaged ossicles.  

A device to measure and record the fluorescent flashes in a scintillator exposed to high-energy radiation, as in a scintillascope. A device for detecting and counting radiation. Flashes of light are produced when radiation is detected. A contrivance designed to quantify the emission of light (scintillation) generated by the interaction of ionizing radiation with a…

One of the stages that occurs during the asexual phase of the life cycle of a sporozoan. A stage appearing in the life cycle of a sporozoan protozoon resulting from multiple division or schizogony. A phase in the non-sexual lifecycle of the malaria-causing parasite. The primary cell in coccidia that generates numerous crescent-like spores.  

A phase of asexual reproduction in the life cycle of a sporozoan (protozoan parasite) that occurs in the liver or red blood cells. The parasite grows and divides many times to form a schizont, which contains many merozoites. The eventual release of merozoites of Plasmodium, the malaria parasite, from the blood cells produces fever in…

Fissuring of the tongue. Congenital fissures are transverse, whereas those due to disease (such as syphilis) are usually longitudinal.  

A disorder of relationships within a family, in which parents quarrel and children are made to take sides. It was proposed as a cause of later schizophrenia in the children, but is more likely to be a nonspecific cause of psychological vulnerability.  

A form of synarthrosis (immovable joint) in which a crest of one bone fits into a groove of another. A form of wedge and groove suture in which a crest of one bone fits into a groove of another. A kind of joint where a slender portion of one bone fits into a groove or…

Aqueous fuchsin solution decolorized with sulfur dioxide. A blue coloration develops in the presence of aldehydes.  

A boat-shaped bone of the wrist. It articulates with the trapezium and trapezoid bones in front and with the radius behind. The outside bone on the thumb side of the hand in the row of carpal (wrist) bones nearest to the forearm. Fracture of the scaphoid is a common wrist injury that usually occurs when…

A genus of widely distributed nonbloodsucking flies, the flesh flies. Maggots are normally found in carrion or excrement but occasionally females will deposit their eggs in wounds or ulcers giving off a foul-smelling discharge; the presence of the maggots causes a serious myiasis. Rarely, maggots may be ingested with food and give rise to an…