testacean definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Any of various rhizopods of the order Testacea, characterized by the presence of a shell.
Origin: From New Latin Testācea, order name, from Latin, neuter pl. of testāceus, covered with a shell, from testa, shell.
- tes·taˈcean adjective
testacean - Science Definition
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.