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单词 testacean
释义
tes·ta·cean (tĕ-stāshən)
n.
Any of various amoeboid protozoans having a hard external covering, found in soil and freshwater habitats.

[From New Latin Testācea, former order name, from Latin, neuter pl. of testāceus, covered with a shell, from testa, shell.]

tes·tacean adj.
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