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heterostracan

American  
[het-uh-ros-truh-kuhn] / ˌhɛt əˈrɒs trə kən /

noun

Paleontology.

  1. any of several ostracoderms of the order Heterostraci, from the Silurian and Devonian Periods, having the anterior part of the body enclosed in bony plates.

Etymology

Origin of heterostracan

< New Latin Heterostrac(i) (plural) name of the order, equivalent to heter- heter- ( def. ) + Greek  ostrak(ón) (singular) “shell” + -an

Example Sentences

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The exact nature of heterostracan feeding remains an open question.

From Science Daily • Jan. 16, 2024

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.