razorback

[rey-zer-bak]
noun
1.
a finback or rorqual.
2.
a wild or semiwild hog with a ridgelike back, common in the southern U.S.
3.
a sharp narrow ridge or range of hills.
adjective
4.
Also, razorbacked, razor-backed. having a sharp ridge along the back.

Origin:
1815–25; razor + back1

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World English Dictionary
razorback (ˈreɪzəˌbæk)
 
n
1.  See rorqual Also called: finback the common rorqual
2.  a semiwild or wild pig of the southeastern US, having a narrow body, long legs, and a ridged back

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The razorback sucker eats both invertebrates and algae.
Today, in addition to trout, the hatchery also rears native razorback sucker and bonytail chub to help aid in their recovery.
Razorback sucker feed on insects, plankton, and plant matter.
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