v. 1 intr. a (of a fibre) split up into fibrils. b (of a muscle, esp. in the heart) undergo a quivering movement in fibrils. 2 tr. break (a fibre) into fibrils. fibrillation n.
FIBRILLATE
Meaning of FIBRILLATE in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012