TUBULIN Meaning of TUBULIN in English /tooh"byeuh lin, tyooh"-/ , n. Biochem.either of two globular proteins that form the structural subunits of microtubules. [ 1965-70; TUBULE + -IN 2 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012