Acicula
Pronunciation : A*cic"u*la
Part of Speech : n.; pl. Acicul?.
Etymology : [L., a small needle, dimin. of acus needle.] (Nat. Hist.)
Definition : Defn: One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.
Source : Webster's Unabridged Dictionary, 1913