A·cic·u·la n.; pl. Aciculæ Nat. Hist. One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.
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acicula
n : a needle-like part or structure of a plant or animal or
crystal; as a spine or bristle or crystal
[also: aciculae (pl)]
acicula
See aciculum
[also: aciculae (pl)]