10 letters · 14 points in Scrabble
noun a sterile liquid containing a purified protein derivative of the tuberculosis bacterium; used in the diagnosis of tuberculosis
originEtymology tree English tuberculosis Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English tuberculin From tuberculosis + -in.
Etymology from Wiktionary, CC BY-SA 3.0