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tropical year
tropicalize
tropicbird
tropine
tropism
tropo-
tropology
tropomyosin
troponin
tropopause
troposphere
tropotaxis
-tropous
troppo
-tropy
Trot
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troponin
tro·po·nin [ trṓpənin, tróppənin ]


noun 
Definition:
 
muscle protein: a protein complex that plays a role in muscle contraction
[Mid-20th century. Contraction <tropomyosin + -in]
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