hydrogen bond

hydrogen bond   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.

Main Entry: hydrogen bond
Function: noun
: an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as ofoxygen, nitrogen, or fluorine) in usually another molecule of the same or a different polar substance —hydrogen bonding noun

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

hydrogen bond   A chemical bond formed between an electropositive atom (typically hydrogen) and a strongly electronegative atom, such as oxygen or nitrogen. Hydrogen bonds are responsible for the bonding of water molecules in liquid and solid states, and are weaker than covalent and ionic bonds.