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the·ca
 theca
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- pronunciation:
- thi
k
| part of speech: |
noun |
| inflections: |
thecae |
| definition: |
in biology, a case, covering, or sac that encloses an organ, part, or entire organism, such as the horny covering of an insect pupa or the spore case of a moss capsule.
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| derivation: |
thecal (adj.) |
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