Tubeworms

Part of speech: noun

Definitions

1. Marine worms that live inside long, hard tubes attached to surfaces in the ocean
2. Ocean-dwelling segmented worms that build protective tubular structures around their bodies
3. Sea worms characterized by their habit of residing within extended, rigid tubes they secrete on rocks or other underwater objects

Etymology: "Tubeworms" is the plural of "tubeworm," a compound of "tube" and "worm." The name describes the animal's most distinctive feature: it lives inside a rigid tube that it builds around itself, cementing it to rocks, shells, or other objects on the seafloor. Only the crown of feathery tentacles emerges from the opening, so the worm is largely hidden from view, and the word simply reports that architecture in two plain English parts. Both halves are old, inherited native words. "Tube" came into English from Latin "tubus," meaning a pipe or channel, while "worm" comes from Old English "wyrm," a general term for creeping or crawling creatures, including snakes and grubs. Joined together, they give a name that is literal and descriptive rather than borrowed or coined from classical roots.