- any of several sharks constituting the family Hexanchidae, having six or seven gill openings on each side of the head.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cow shark
The European species are Hexanchus griseus, the cow-shark, and Heptranchias cinereus.A Guide to the Study of Fishes, Volume 1 (of 2)
David Starr Jordan
- any large primitive shark, esp Hexanchus griseum, of the family Hexanchidae of warm and temperate watersAlso called: six-gilled shark