Illustration of smooth hound
smooth hound
noun
: any of several dogfishes (genus Mustelus) closely related to or included with the requiem sharks
Example Sentences
Recent Examples on the Web Meet the sharks offshore, including the leopard, horn, swell and grey smooth hound species. 
Linda Mcintosh, San Diego Union-Tribune, 15 Mar. 2021
Linda Mcintosh, San Diego Union-Tribune, 15 Mar. 2021 Word History
Etymology
from the absence of a spine in front of the dorsal fin
First Known Use
1603, in the meaning defined above