What's the difference between acicula and aciculate?

Acicula

Definition:

• (n.) One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.

Example Sentences:

Aciculate

Definition:

• (a.) Alt. of Aciculated

Example Sentences:

• (1) Plasmogamy between compatible strains is followed by the development of very large elongate asci bearing vestiges of the zygotes and the formation in each ascus of two unusually large aciculate ascospores similar to those formed by members of the genus Metschnikowia.