fibrilPronunciation: /ˈfʌɪbrɪl/Definition of fibril noun technical a small or slender fibre:each muscle fibre is subdivided into smaller fibrilsDerivatives fibrillar adjective fibrillary adjective Origin: mid 17th century: from modern Latin fibrilla, diminutive of Latin fibra (see fibre)fibril in other Oxford dictionaries Definition of fibril in the US English dictionary
