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  1. (technology, jargon) Flat, smooth surface produced by cleavage, or any similar surface produced by similar techniques, as in glass.
verb (cleaves, cleaving, cleft, clove, or in UK: cleaved, cleft, cloven, or in UK: cleaved)
  1. (transitive) To split or sever something or as if with a sharp instrument.
  2. (context, transitive, mineralogy) To break a single crystal (such as a gemstone or semiconductor wafer) along one of its more symmetrical crystallographic planes (often by impact), forming facets on the resulting pieces.
  3. (transitive) To make or accomplish by or as if by cutting: cleave a path through the ice.
  4. (transitive) To pierce or penetrate.
The wings cleaved the foggy air.
  1. (context, transitive, chemistry) To split (a complex molecule) into simpler molecules.
  2. (context, intransitive, mineralogy) Of a crystal, to split along a natural plane of division.

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