n. [ 1st lug + worm. ] (Zool.) 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. [ 1913 Webster ]

n. (Zool.) Any caterpillar which has the general appearance of a slug, as do those of certain moths belonging to Limacodes and allied genera, and those of certain sawflies. [ 1913 Webster ]