fibrillˈa /fī- or fi-/ noun (pl fibrillˈae /-ē/)

A fibril filament

fiˈbrillar, fiˈbrillary, fiˈbrillate or fiˈbrillated adjective

Relating to, of the nature of, or having fibrils or a fibrous structure

fiˈbrillate intransitive verb and transitive verb

To (make) undergo fibrillation

fibrillāˈtion noun

1. The production or formation of fibrils or fibres
2. A mass of fibrils
3. A twitching of muscle fibres
4. Unco-ordinated contraction of muscle-fibres in the heart (medicine)

fiˈbrillin noun

A protein found in connective tissue

fiˈbrillose adjective

Having, or covered with, small fibres or the appearance of small fibres

fiˈbrillous adjective

Relating to or having small fibres