The Collaborative International Dictionary of English v.0.48:
Multipolar \Mul`ti*po"lar\, a. [Multi- + polar.] 1. Having many poles; in Anat., designating specif. a nerve cell which has several dendrites. [Webster 1913 Suppl.] 2. (Elec.) Having, or pertaining to, many poles, as a field magnet or armature of a dynamo, or a dynamo having such a field magnet or (sometimes) armature. [Webster 1913 Suppl.]