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pinnigrade

American  
[pin-i-greyd] / ˈpɪn ɪˌgreɪd /

adjective

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

noun

  1. a pinnigrade animal.

pinnigrade Scientific  
/ pĭn′ĭ-grād′ /

  1. Walking by means of finlike organs or flippers, as seals and walruses.

Etymology

Origin of pinnigrade

From the New Latin word pinnigradus, dating back to 1840–50. See pinna, -i-, -grade

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.