Category: S
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Scintillascope
An instrument which produces a scintigram. The instrument used to produce a scintigram. It incorporates a scintillator, a device to magnify the fluorescence produced in it by radiations, and a means of recording the results, often aided by a computer.
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Scintigram
An image recording radiation from radioactive isotopes injected into the body. Nuclear image known as a 3f scintigraphy x-ray. A diagram showing the distribution of radioactive tracer in a part of the body, produced by recording the flashes of light given off by a scintillator as it is struck by radiation of different intensities. By…
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Scientist
A person who specialises in scientific studies.
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Scientific
Referring to science.
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Schwartze’s operation
The original surgical operation to drain fluid and remove infected tissue from the mastoid process [After Hermann Schwartze (1837-1910), German otologist]. A surgical procedure on the mastoid that retains the external auditory canal (ear opening).
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Schwannoma
A neurofibroma, a benign tumour of a peripheral nerve. A benign tumor of the neurilemma of a nerve. A neoplasm originating from the cells comprising the protective myelin sheath enveloping numerous nerve cells. A growth originating from the protective covering of a nerve.
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Schwann cells
The cells which form the myelin sheath around a nerve fibre. Cells that lay down the myelin sheath around the axon of certain nerve fibers. A structure of the peripheral nervous system that forms the myelin sheath and neurilemma of a nerve fiber. The cells that lay down the myelin sheath around the axon of…
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School
A place where children are taught. A specialised section of a university. An institution for education, including (for students of different ages) preschool, elementary school, middle school, high school, and college or university.
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Schlemm’s canal
A circular canal in the sclera of the eye, which drains the aqueous humour [Described 1830. After Friedrich Schlemm (1795-1858), Professor of Anatomy in Berlin, Germany.] A channel in the eye, at the junction of the cornea and the sclera, through which the aqueous humor drains.
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Schlatter’s disease
Inflammation in the bones and cartilage at the top of the tibia [Described 1903. After Carl Schlatter (1864-1934), Professor of Surgery at Zurich, Switzerland.]