acicular

[uh-sik-yuh-ler]
adjective
2.
Metallurgy.
a.
(of cast iron) containing ferrite in a needlelike form.
b.
(of an alloy) having a microstructure of needlelike components.

Origin:
1785–95; acicul(a) + -ar1

acicularity [uh-sik-yuh-lar-i-tee] , noun
acicularly, adverb
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World English Dictionary
acicula (əˈsɪkjʊlə)
 
n , pl -lae
a needle-shaped part, such as a spine, prickle, or crystal
 
[C19: New Latin, diminutive of acus needle]
 
a'cicular
 
adj

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Example sentences
Pure phenol consists of white or clear acicular crystals.
Also, they tend to be acicular rather than filiform.
Synonyms
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