D defs.my
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Entry 1 sense Webster, 1913

diatomaceous

/(dī`ȧ*tō̇*mā"shŭs)/ · di·a·to·ma·ceous · IPA /ˌdaɪ.ə.təˈmeɪ.ʃəs/
01 a. consisting of or containing diatoms or their fossils; as, diatomaceous earth (used as a component of dynamite).
  1. 1.
    consisting of or containing diatoms or their fossils; as, diatomaceous earth (used as a component of dynamite).