polar molecule

a molecule in which the centroid of the positive charges is different from the centroid of the negative charges.
Also called dipole.
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Main Entry:  polar molecule
Part of Speech:  n
Definition:  an asymmetric molecule with non-uniform positive and negative charges; also called dipole
Example:  A polar molecule has a partial positive charge in one part of the molecule and complementary negative charge in another part.
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Example sentences
Non-ionizing radiation create an electric field, and water is a polar molecule.
It's a polar molecule, meaning that each end of it has a different electrical
  charge that attracts and repels different materials.
Water is a polar molecule-that is it has a negatively charged end and a
  positively charged end.
The crystallized molecular ions will be used to study the cold ion-polar
  molecule reactions.
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