testacean

tes·ta·cean

[te-stey-shuhn]
adjective Zoology.
having a shell or test.

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

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Science Dictionary
testacean   (tě-stā'shən)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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00:10
Testacean is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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