exine

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noun ex·ine \ˈek-ˌsēn, -ˌsīn\

Definition of exine

  1. :  the outer of the two major layers forming the walls of some spores and especially pollen grains

Origin and Etymology of exine

International Scientific Vocabulary ex- + in- fibrous tissue, from Greek in-, is tendon


First Known Use: 1839


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