Diatom
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 division. By some authors diatoms are called {Bacillari[ae]}, but this word is not in general use. [1913 Webster]

2. A particle or atom endowed with the vital principle. [1913 Webster]

The individual is nothing. He is no more than the diatom, the bit of protoplasm. --Mrs. E. Lynn Linton. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • 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 — 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

  • 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 — 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

  • Diatom — Bacillariophyta Bacillariophyta ou Diatomées …   Wikipédia en Français

  • diatom — Algae of the division Bacillariophyta; largely unicellular and characterized by having cell walls of hydrated silica embedded in an organic matrix. The cell walls are formed in two halves that fit together like the lid and base of a pillbox and… …   Dictionary of molecular biology

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