- 1. n. 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. Source: opted
- 2. n. The chitinous cup which protects the hydranths of certain hydroids. Source: opted
- 3. n. The more or less cuplike calicle of a coral. Source: opted
- 4. n. The wall forming a calicle of a coral. Source: opted
- 5. n. a case or sheath especially a pollen sac or moss capsule Source: wordnet
- 6. n. outer sheath of the pupa of certain insects Source: wordnet
- 7. 1. 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. (Zoöl.) (a) The chitinous cup which protects the hydranths of certain hydroids. (b) The more or less cuplike calicle of a coral. (c) The wall forming a calicle of a coral. Source: webster
- 8. n. a case or sheath especially a pollen sac or moss capsule n. outer sheath of the pupa of certain insects Source: ecdict
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