| acicula | Origin: L, a small needle, dimin. Of acus needle. One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal. Source: Websters Dictionary (01 Mar 1998) |
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| acicular | <botany> Resembling a needle (typically used to describe the leaf of a plant). (06 May 1997) |
| aciculate | <botany> Used to describe a plant part which is finely scored on the surface, as if scratched by a pin. (09 Oct 1997) |