diatom

名词 n.
中文释义
英 /ˈdaɪ.ə.təm/    美 /ˈdaɪ.əˌtɔm/

英文释义

名词 n.
  1. Any of a group of minute unicellular algae having a siliceous covering of great delicacy, now categorized as class Diatomophyceae or division Bacillariophyta.
    — Diatoms are enclosed in two shells that fit together like a pillbox.
  2. A molecule composed of two atoms of the same element; a homonuclear diatomic molecule.
    — We show here, through a systematic study of the covalent chemical bond covering the entire periodic system, that the maximum bond multiplicity is six. The maximum value is reached by the tungsten diatom, W₂. No other pair of atoms in the periodic system (atomic numbers smaller than about 100) reaches a higher bond order.

词形变化

diatoms plural diatoms plural

词源

词源 1
From (deprecated) genus name Diatoma, from Ancient Greek διάτομος (diátomos, “cut through, cut in half”).
词源 2
From di- + atom.
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