zone plate

English

Noun

zone plate (plural zone plates)

1. A Fresnel zone plate.
   • 2012 June 9, “Twinkle, twinkle, little planet”, in The Economist:

     And Fresnel's countryman, Laurent Koechlin, of the Midi-Pyrénées observatory, thinks zone plates are the way to find out if there is life on other planets.

Anagrams

• pentazole