Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


Having the shape of a needle: acicular crystals.
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.


(əˈsɪk yə lər)

a•cic`u•lar′i•ty, n.
a•cic′u•lar•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.acicular - narrow and long and pointedacicular - narrow and long and pointed; as pine leaves
unsubdivided, simple - (botany) of leaf shapes; of leaves having no divisions or subdivisions
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


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.
References in periodicals archive ?
The principal difference in crystal structure between polyps from the two different water depths was that acicular crystals of samples from 9 m were much more finely structured and appeared to have a higher porosity than their counterparts from the reef flat.
Median parapodia with superior notopodial ligule digitate, inferior ligule blunt, longer than wide, acicular neuropodial ligule wider than long, slightly triangular, inferior ligule longer than wide (Fig.
In addition to the ultrathin coating, the Nano Cubic system incorporates two types of extremely fine magnetic particles: acicular ferromagnetic alloy particles and tabular ferromagnetic hexagonal barium ferrite particles.
Discrete multistate character 12 (leaf shape in cross-section) was treated as additive, because a direct transformation series was hypothesized for it following the semophyletic evolutionary sequence suggested by Bocher (1979) from planate leaf blade, to boat shaped, to acicular by marked involution.
To the best of our knowledge, the use of acicular precipitated calcium carbonate as whisker is not reported in technical literature.
7, revealed a greater presence of grain boundary ferrite (GBF) and acicular ferrite (AF) at the fusion zone in (b), (c) and (d).
Massive azurite is found with acicular malachite in one of the upper workings (7th level) of the Reward mine.
1 mm thick near the base, thinly coriaceous mainly toward the base, suberect-arcuate, slightly channeled, dark green to slightly bronze colored, abaxially densely and coarsely white-lepidote with trichomes obscuring the color of the blade, finely nerved, adaxially subdensely white lepidote only at the base and glabrous toward the apex, apex long attenuate-caudate; margins laxly spinose, spines narrowly triangular, acicular and pale castaneous toward the apex, 0.5-1.5 mm long, 0.5-1 mm wide at base, 6-11 mm apart, slightly to distinctly antrorse-uncinate.
Hypoeutectic cast Al-Si alloys are highly susceptible to occurrence of the sharp edges of the coarse acicular silicon phase that promote crack initiation, and propagation in alloys and also the porosity formation
Added into a liquid Al-Si alloy, STRONAL 9010 modifies the structure of the eutectic silicon and induces the structure to change the silicon morphology from acicular lamellar to uniform and globular.
Another important difference with this sabellid previously reported habiting abalone shells is the shape of the abdominal uncini, in Oriopsis are rasp-shaped plates, without main fang, defining a clear difference with the abdominal uncini acicular with a single main tooth crowned with shorter series of teeth, characteristic of T.
In the other case precipitation of high amount of acicular carbide phase occurred at the seam-base boundary in the process of subsequent heat treatment, whereby width of the diffusion zone increased up to 30-50 [micro]m and more.