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 (fī′brəl, fĭb′rəl)
1. A small slender fiber or filament.
2. Anatomy A threadlike fiber or filament, such as a myofibril or neurofibril, that is a constituent of a cell or larger structure.
3. A long strand of proteins that are aggregated together in a beta-sheet structure; an amyloid fibril.

[New Latin fibrilla, diminutive of Latin fibra, fiber.]

fi′bril·lar (-lər), fi′bril·lar′y (-lĕr′ē) adj.
fi′bril·lose′ (-lōs′) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈfaɪbrɪl) or


n, pl -brils or -brillae (-ˈbrɪliː)
1. a small fibre or part of a fibre
2. (Biology) biology a threadlike structure, such as a root hair or a thread of muscle tissue
[C17: from New Latin fibrilla a little fibre]
ˈfibrilar, fiˈbrillar, fiˈbrillose adj
fiˈbrilliˌform adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈfaɪ brəl, ˈfɪb rəl)

1. a small or fine fiber or threadlike structure.
[1655–65; < New Latin <fibrilla < Latin fibra fiber]
fi′bril•lar, adj.
fi′bril•lose`, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fibril - a very slender natural or synthetic fiberfibril - a very slender natural or synthetic fiber
barb - one of the parallel filaments projecting from the main shaft of a feather
cobweb, gossamer - filaments from a web that was spun by a spider
chromatid - one of two identical strands into which a chromosome splits during mitosis
myofibril, myofibrilla, sarcostyle - one of many contractile filaments that make up a striated muscle fiber
rhizoid - any of various slender filaments that function as roots in mosses and ferns and fungi etc
hypha - any of the threadlike filaments forming the mycelium of a fungus
paraphysis - a sterile simple or branched filament or hair borne among sporangia; may be pointed or clubbed
fiber, fibre - a slender and greatly elongated substance capable of being spun into yarn
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


A very fine continuous strand:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n. filamento, fibrilla, fibra pequeña.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
In taiep rats, the activation of astrocytes, along with the activation of the glial fibrilar acidic protein [22, 35] and concomitantly the activation of nitric oxide synthase, has been demonstrated to induce neuronal damage and endothelial dysfunction, which are probably due to a neuroinflammation process [35].
A variabilidade do comprimento das fibras no sentido radial deve-se, provavelmente, a presenca de uma zona de madeira juvenil proxima a medula, a qual apresenta, dentre outras caracteristicas, fibras curtas, com menor diametro, paredes mais estreitas e maior angulo fibrilar na camada S2, o que repercute diretamente na qualidade da madeira (TOMAZELLO FILHO, 1987; SETTE JUNIOR et al., 2012; TREVISAN et al., 2013).
En este sentido, la longitud de hojas en col se relaciono con el incremento en el contenido de micro elementos esenciales como el Cu, Mn y B que presento el compost de jacinto de agua respecto al vermicompost (Tabla I), sobre todo este ultimo elemento, el cual retenido en las celulas de las plantas esta confinado y fuertemente unido a compuestos peptidos de la pared celular (Hu y Brown, 1994), principalmente la pectina, que es un polisacarido no fibrilar, rico en acido D-galacturonico, heterogeneamente ramificado y muy hidratado.