tropo-
Turning; change.
[Greek tropos, turning.]
The troposphere is the lowest region of the atmosphere, which exhibits convection; it extends from the earth's surface to the tropopause, the interface between the troposphere and the stratosphere; tropomyosin is a protein involved in muscle contraction, myosin and occurs together with a related protein, troponin, in the thin filaments of muscle tissue. Tropology is the figurative use of language; a trope is a figurative or metaphorical use of a word or expression.
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