Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or flourine atom, usually of another molecule.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A weak bond in which a hydrogen atom in one molecule is attracted to an electronegative atom (usually nitrogen or oxygen) in the same or different molecule.
  • v. To bond to another species by means of hydrogen bonds. E.g. Water hydrogen bonds with itself.

from the GNU version of the Collaborative International Dictionary of English

  • n. a non-covalent bond between hydrogen and another atom, usually oxygen or nitrogen. It does not involve the sharing of electrons between the bonded atoms, and therefore does not satisfy the valence of either atom. Hydrogen bonds are weak (ca. 5 kcal/mol) and may be frequently broken and reformed in solution at room temperature.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond

Etymologies

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