spiculum

noun

spic·​u·​lum

-ləm

plural spicula

-lə

1

: any of various small spicular organs (such as the spines of an echinoderm, the dart of various snails, or a copulatory bristle on a nematode)

2

: spicule

Word History

Etymology

Latin, small sharp organ or part, sting, arrowhead, arrow

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now