[fahy-bruh l, fib-ruh l]
- 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.
Origin of fibril
1655–65; < New Latin fibrilla, equivalent to Latin fibr(a) fiber + -illa diminutive suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fibrillar
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.
The variation of Nyctotherus ovalis Leidy, and its fibrillar system.The Biotic Associations of Cockroaches
Louis M. Roth
(·4 grain), in about two hours; there are fibrillar twitchings of single groups of muscles and narcosis.
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
fibrilla (faɪˈbrɪlə, fɪ-)
- a small fibre or part of a fibre
- biology a threadlike structure, such as a root hair or a thread of muscle tissue
C17: from New Latin fibrilla a little fibre
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
Word Origin and History for fibrillar
1680s, back-formation from Modern Latin fibrilla, diminutive of Latin fibra (see fiber).
Online Etymology Dictionary, © 2010 Douglas Harper
- Relating to a fibril.
- Relating to the fine rapid contractions or twitchings of fibers or of small groups of fibers in skeletal or cardiac muscle.
- A minute fiber.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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.