The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various segmented worms, especially of the genera Nereis and Arenicola, generally inhabiting coastal mud or sand and often used as fishing bait.
the GNU version of the Collaborative International Dictionary of English
n. Any one of numerous species of annelids which burrow in the sand of the seashore.
n. Any species of annelids of the genus Sabellaria. They construct firm tubes of agglutinated sand on rocks and shells, and are sometimes destructive to oysters.
n. The chigoe, a species of flea.
The Century Dictionary and Cyclopedia
n. A worm that lives in the sand: applied to various arenicolous or limicolous annelids, found especially in the sand of the sea-shore, and quite different from ordinary earthworms. They are much used for bait.
n. A worm that constructs a sand-tube, as a species of Sabellaria.
Word Usage
"Their leader, Vooper Werribee, counts 130 members who enjoy roleplay in the sands of an Arrakis based in Second Life, taking on the personae of sandworm-riding Fremen, Harkonnen-hating Atreides, and so on."