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testacean

American  
[te-stey-shuhn] / tɛˈsteɪ ʃən /

adjective

Zoology.

  1. having a shell or test.

testacean Scientific  
/ tĕ-stā′shən /

  1. Any of various protozoans of the order Arcellinida (or Testacida) that are encased in a shell. Testaceans are rhizopods and are related to amoebas. Their shell usually has one chamber and may be secreted by the organism as a chitinous or siliceous covering, or may be glued together out of sand particles.

Etymology

Origin of testacean

1835–45; < Latin testāce ( us ) shell-covered, testaceous + -an

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.