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Related to smoothhound: smoothhound shark
smooth-houndor smooth·hound (smo͞oth′hound′)
Any of various bottom-dwelling sharks of the genus Mustelus, having a slender body and a large second dorsal fin.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a smooth dogfish, esp. Mustelus mustelus, of European shores. Also, smooth′hound shark′.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.