LUGWORM
lugworm, lug, lobworm
(noun) marine worms having a row of tufted gills along each side of the back; often used for fishing bait
Source: WordNet® 3.1
Noun
lugworm (plural lugworms)
Any of several species of large marine annelid worm of the genus Arenicola
especially the northern lugworm (Arenicola marina), whose coiled castings can often be seen on beaches at low tide.
black lugworm (Arenicola defodiens)
Synonyms
• (Arenicola marina): lobworm, sandworm, blow lugworm
Source: Wiktionary
Lug"worm`, n. Etym: [1st lug + worm.] (Zoöl.)
Definition: A large marine annelid (Arenicola marina) having a row of
tufted gills along each side of the back. It is found burrowing in
sandy beaches, both in America and Europe, and is used for bait by
European fishermen. Called also lobworm, and baitworm.
Source: Webster’s Unabridged Dictionary 1913 Edition