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1. (n.) theca
a case or sheath enclosing an animal organ, structure, etc., as the horny covering of an insect pupa.
2. theca
a sac, cell, capsule, or sporangium of a plant or mushroom.
Etymology: (1655–65; < L thēca < Gk thēkē case, cover, akin to tithénai to place, put)
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| Definition of 'theca' |
Princeton's WordNet |
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1. (noun) theca, sac
a case or sheath especially a pollen sac or moss capsule
2. (noun) theca
outer sheath of the pupa of certain insects
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| Definition of 'theca' |
Webster Dictionary |
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1. (noun) theca
a sheath; a case; as, the theca, or cell, of an anther; the theca, or spore case, of a fungus; the theca of the spinal cord
2. (noun) theca
the chitinous cup which protects the hydranths of certain hydroids
3. (noun) theca
the more or less cuplike calicle of a coral
4. (noun) theca
the wall forming a calicle of a coral
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Definitions of theca 
