Definition of frustule in English:

frustule

Syllabification: frus·tule
Pronunciation: /ˈfrəsˌCHo͞ol
 
/

noun

Botany
  • The silicified cell wall of a diatom, consisting of two valves or overlapping halves.
    More example sentences
    • Observe the diatom frustule below at right, in which the two halves have been pushed slightly askew.
    • Bacteria accelerate silica dissolution in the sea by colonizing and enzymatically degrading the organic matrix of diatom frustules.
    • Like its brethren, it is encased by a frustule, a rigid cell wall delicately marked with pores in patterns distinctive enough for scientists to tell the species apart.

Origin

mid 19th century: from Latin frustulum, diminutive of frustum (see frustum).

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Pronunciation: grəʊˈtɛskəri
noun
grotesque quality or grotesque things collectively