epitheca

English

Ancient Greek ἐπί (epí, “upon”) + θήκη (thḗkē, “case, box, receptacle”)

epitheca (plural epithecae)

(microbiology, planktology) The upper half of the theca of a thecate protist such as a diatom or dinoflagellate.
- Frustule
  The frustule's structure is usually composed of two overlapping sections, known as valves. The upper valve is termed the epitheca and is slightly larger and overlaps the lower valve, the hypotheca.
- ucl.ac.uk diatom webpage
  The diatom frustule is often likened to a pill-box ... with an epitheca (larger upper valve), and a hypotheca (smaller lower valve).

单词	epitheca
释义	epitheca English Etymology Ancient Greek ἐπί (epí, “upon”) + θήκη (thḗkē, “case, box, receptacle”) Noun epitheca (plural epithecae) (microbiology, planktology) The upper half of the theca of a thecate protist such as a diatom or dinoflagellate. Frustule The frustule's structure is usually composed of two overlapping sections, known as valves. The upper valve is termed the epitheca and is slightly larger and overlaps the lower valve, the hypotheca. ucl.ac.uk diatom webpage The diatom frustule is often likened to a pill-box ... with an epitheca (larger upper valve), and a hypotheca (smaller lower valve). Coordinate terms hypotheca Derived terms epithecal See also Frustule Anagrams petechia
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