Function: noun
Etymology: from the absence of a spine in front of the dorsal fin
Date: 1603
: any of several dogfishes (genus Mustelus ) closely related to or included with the requiem sharks
smooth hound
Function: noun
Etymology: from the absence of a spine in front of the dorsal fin
Date: 1603
: any of several dogfishes (genus Mustelus ) closely related to or included with the requiem sharks
smooth hound
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012