dipole
n. countablen. a pair of equal but opposite electric charges or magnetic poles that are very close together. In chemistry, it describes a molecule where one end is slightly positive and the other is slightly negative.
n. a pair of equal and opposite electric charges or magnetic poles separated by a small distance. In chemistry, it refers to a molecule with a permanent separation of charge, resulting in a positive and a negative end.
Water is a common example of a polar dipole.
The alignment of dipoles in a liquid can be influenced by the presence of an external electric field.
In molecular biology, the formation of hydrogen bonds between water molecules is facilitated by the dipole-dipole interactions that occur between the oxygen and hydrogen atoms.
From di- + pole.