What is "buccinum undatum"

Whelk \Whelk\ (hw[e^]lk), n. [OE. welk, wilk, AS. weoloc, weloc, wiloc. Cf. Whilk, and Wilk.] (Zo["o]l.) Any one numerous species of large marine gastropods belonging to Buccinum and allied genera; especially, Buccinum undatum, common on the coasts both of Europe and North America, and much used as food in Europe.

Whelk tingle, a dog whelk. See under Dog.

Buccinum \Buc"ci*num\, prop. n. [L., a trumpet, a trumpet shell.] (Zo["o]l.) A genus of large univalve mollusks abundant in the arctic seas. It includes the common whelk ( Buccinum undatum).

Buccinum undatum, the common whelk or the waved buccinum, is a large, edible marine gastropod in the family Buccinidae, the "true whelks".