Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The upper half of the theca of a thecate protist such as a diatom or dinoflagellate.

from the GNU version of the Collaborative International Dictionary of English

  • n. A continuous and, usually, structureless layer which covers more or less of the exterior of many corals.

from The Century Dictionary and Cyclopedia

  • n. In zoology, a continuous external layer investing and surrounding the thecæ of certain corals.
  • n. [capitalized] In entomology, a genus of neuropterous insects, of the family Libellulidæ, or dragon-flies.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek ἐπί (epi) + θήκη (thēkē, "case, box, receptacle")

Examples

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