1. n. [Drilling Fluids]
A compound whose electrons are not shared equally in chemical bonds. A polar compound is not necessarily ionized. Water is a polar compound. Polymers can have ionizing polar groups on their complex structures.
See: anion, asphaltic mud additive, cation, clay, clay extender, deflocculant, polyelectrolyte, polymer, salt, sulfonated polystyrene-maleic anhydride copolymer