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pinnigrade

[pin-i-greyd] /ˈpɪn ɪˌgreɪd/
adjective
1.
moving by means of finlike parts or flippers, as the seals and walruses.
noun
2.
a pinnigrade animal.
Origin
1840-1850
1840-50; < New Latin pinnigradus. See pinna, -i-, -grade
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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pinnigrade in Science
pinnigrade
  (pĭn'ĭ-grād')   
Walking by means of finlike organs or flippers, as seals and walruses.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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