Definitions
from The Century Dictionary.
- noun In zoology, a continuous external layer investing and surrounding the thecæ of certain corals.
- noun [capitalized] In entomology, a genus of neuropterous insects, of the family Libellulidæ, or dragon-flies.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Zoöl.) A continuous and, usually, structureless layer which covers more or less of the exterior of many corals.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun microbiology, planktology The upper half of the
theca of athecate protist such as adiatom ordinoflagellate .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Ancient Greek ἐπί (epi) + θήκη (thēkē, "case, box, receptacle")
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