Acicular



shaped like a needle.
Metallurgy.

(of cast iron) containing ferrite in a needlelike form.
(of an alloy) having a microstructure of needlelike components.

Historical Examples

Hyoscyamine crystallizes in the acicular form, with greater difficulty even than atropine, it also forms less compact crystals.
Scientific American Supplement, No. 324, March 18, 1882 Various

By repeated solutions in alcohol it may be obtained under the form of white, silky, acicular crystals.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

They were not small and acicular, were nearly alike in the three basins, and had effloresced only on a few minute points.
Quarterly Journal of Science, Literature and the Arts, July-December, 1827 Various

It crystallizes in the orthorhombic system, and the crystals are either prismatic or acicular in habit.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 Various

Valve very narrow, lanceolate, acicular, with obtuse apices.
The Diatomaceae of Philadelphia and Vicinity Charles Sumner Boyer

acicular, as-ik′ū-lar, adj. needle-shaped; slender and sharp-pointed.
Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various

The picrate of silver forms beautiful starry groups of acicular crystals, having the colour and lustre of gold.
Cooley’s Practical Receipts, Volume II Arnold Cooley

Spores of Bacidia fuscorubella to illustrate the several-celled, hyaline, acicular type.
Ohio Biological Survey, Bull. 10, Vol. 11, No. 6 Bruce Fink and Leafy J. Corrington

By re-solution in alcohol it may be obtained under the form of colourless, prismatic, acicular crystals.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

Soon Birdie and myself were a mass of acicular crystals; it was a true easterly fog.
Celebrated Women Travellers of the Nineteenth Century W. H. Davenport Adams

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