[ pin-i-greyd ]
/ ˈpɪn ɪˌgreɪd /


moving by means of finlike parts or flippers, as the seals and walruses.


a pinnigrade animal.

Origin of pinnigrade

From the New Latin word pinnigradus, dating back to 1840–50. See pinna, -i-, -grade Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Scientific definitions for pinnigrade

[ pĭnĭ-grād′ ]

Walking by means of finlike organs or flippers, as seals and walruses.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.