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testacean

[te-stey-shuh n]
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adjective Zoology.
  1. having a shell or test.
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Origin of testacean

1835–45; < Latin testāce(us) shell-covered, testaceous + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

testacean in Science

testacean

[tĕ-stāshən]
  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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.