noun

1. A little spike; a spikelet.

2. A pointed fleshy appendage.

noun

1. A thrusting javelin used by Romans that replaced the pilum in the late 3rd century.

2. A sharp, pointed crystal, especially of ice.

3. A sharp, needle-like structure, especially those making up the skeleton of a sponge.

Synonyms: spicule, spicula, spicule