a small or fine fiber or filament.
Botany. any of the delicate hairs on the young roots of some plants.
Cell Biology. any threadlike structure or filament.
- fi·bril·lar, adjective
- fi·bril·lose, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use fibril in a sentence
In a word, it was shown that each central nerve cell, with its fibrillar offshoots, is an isolated entity.A History of Science, Volume 4(of 5) | Henry Smith Williams
The tongue still vibrates vigorously with fibrillar contractions when it is at rest, the mouth being open.The Mind of the Child, Part II | W. Preyer
(·4 grain), in about two hours; there are fibrillar twitchings of single groups of muscles and narcosis.Poisons: Their Effects and Detection | Alexander Wynter Blyth
The nuclear membrane then disappears and fibrillar cell-plasma or cytoplasm invades the nuclear area.Darwin and Modern Science | A.C. Seward and Others
Fibrillar muscular twitching of all the muscles of the body are observed.Poisons: Their Effects and Detection | Alexander Wynter Blyth
British Dictionary definitions for fibril
a small fibre or part of a fibre
biology a threadlike structure, such as a root hair or a thread of muscle tissue
- fibrilar, fibrillar or fibrillose, adjective
- fibrilliform, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for fibril
Any of various threadlike fibers or filaments that are constituent parts of a cell or larger structure. Cellulose fibrils are the main component of cell walls in plants. Fibrils make up the contractile part of striated muscle fiber in the body.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.