FIBRIL Meaning of FIBRIL in English [ 'fʌɪbrɪl ]■ noun technical a small or slender fibre.Derivatives~lar adjective~lary adjective OriginC17: from mod. L. ~la , dimin. of L. fibra (see fibre ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004