diatom 1845, coined from Gk. diatomos "cut in two," from diatemnein "to cut through," from dia- "through" (see DIA- (Cf. dia-)) + temnein "to cut" (see TOME (Cf. tome)). So called because they typically appear to have been cut in half. Related: Diatomic.

Etymology dictionary. 2014.

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  • Diatom — Di a*tom (d[imac] [.a]*t[o^]m), n. [Gr. dia tomos cut in two. See {Diatomous}.] 1. (Bot.) One of the {Diatomace[ae]}, a family of minute unicellular Alg[ae] having a siliceous covering of great delicacy, each individual multiplying by spontaneous …   The Collaborative International Dictionary of English

  • Diatōm — (v. gr., Miner.), was nach einer Richtung leicht theilbar ist; z.B. Diatomischer Schillerspath, so v.w. Schillerspath; Diatomischer Kuphonspath, so v.w. Laumontit …   Pierer's Universal-Lexikon

  • Diatom — Diatom, bei Mohs Mineralien, die nach einer Richtung leicht theilbar sind, z.B. Schillerspath, der deßwegen vorzugsweise D. genannt wird …   Herders Conversations-Lexikon

  • diatom — ► NOUN Biology ▪ a single celled alga which has a cell wall of silica. DERIVATIVES diatomaceous adjective. ORIGIN from Greek diatomos cut in two …   English terms dictionary

  • diatom — [dī′e täm΄, dī′ətəm] n. [ModL diatoma < Gr diatomos, cut in two < diatemnein, to cut through < dia , through + temnein, to cut: see TOMY] any of a class (Bacillariophyceae) of microscopic algae (division Chromophycota), one celled or in… …   English World dictionary

  • Diatom — For a molecule of two atoms, see Diatomic molecule. Diatoms Marine diatoms Scientific classification Domain …   Wikipedia

  • diatom — /duy euh teuhm tom /, n. any of numerous microscopic, unicellular, marine or freshwater algae of the phylum Chrysophyta, having cell walls containing silica. [1835 45; < NL Diatoma orig. a genus name, fem. n. based on Gk diátomos cut in two. See… …   Universalium

  • Diatom Enterprises — Type Private Industry Software development, IT consulting Founded Riga, Latvia (2004) Headquarters Riga, Latvia Key people …   Wikipedia

  • diatom ooze — noun : deep sea deposits rich in diatoms * * * diatom ooze noun A deep sea deposit of diatom frustules • • • Main Entry: ↑diatom …   Useful english dictionary

  • diatom — noun Etymology: ultimately from Greek diatomos cut in half, from diatemnein to cut through, from dia + temnein to cut more at tome Date: 1845 any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae with silicified… …   New Collegiate Dictionary

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