The story
From tropomyosin. Coined by the Japanese researcher Setsuro Ebashi in 1963.http://jb.oxfordjournals.org/content/vol59/issue4/index.dtl
Etymology from Wiktionary, CC BY-SA 4.0.
troponin
Today it means: A heterotrimeric regulatory protein complex found in the thin filaments of striated muscle fibers, including both skeletal and cardiac muscle, that controls calcium-mediated muscle contraction. Full definition →