Definition of plano-concave in English:

plano-concave

Syllabification: pla·no-con·cave
Pronunciation: /ˌplānōˌkänˈkāv, -ˈkänˌkāv
 
/

adjective

  • (Of a lens) with one surface plane and the opposite one concave.
    More example sentences
    • Plano-concave axicons are made of a plano surface in combination with a concave conical surface.
    • This tutorial explores lens action in plano-concave lenses when the object faces the flat side of the lens.

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Pronunciation: skəʊʃ
noun
a small amount; a little