Dictionary  the•caPronunciation: (thē'ku), [key] —n., —pl. -caePronunciation: (-sē). [key] 1. a case or receptacle. 2. Bot., Mycol. a. a sac, cell, or capsule. b. a sporangium. 3. Anat., Zool.a case or sheath enclosing an organ, structure, etc., as the horny covering of an insect pupa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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