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Webster 1913 Edition

Noun.

(Zool.)

(a)

Any one of numerous species of annelids which burrow in the sand of the seashore.

(b)

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.

(c)

The chigoe, a species of flea.

sandworm ‎(plural sandworms)

(Britain) The lugworm, Arenicola marina.
(US) The clam worm or ragworm, Alitta virens.
Hookworm larvae, especially of Ancylostoma braziliense, which cause cutaneous larva migrans.
The chigoe, a species of flea, Tunga penetrans.