Unipolar \U`ni*po"lar\, a. [Uni- + polar.]

1. (Physics) Having, or acting by means of, one pole only.

2. (Anat.) Having but one pole or process; -- applied to those ganglionic nerve cells which have but one radiating process; -- opposed to multipolar.

Unipolar induction (Elec.), induction, as in a conducting circuit, by only one pole of a magnet.

Unipolar stimulation (Physiol.), the simulation sometimes produced when one electrode of an induction apparatus is applied to a nerve; -- called also unipolar induction action. --Du Bois-Reymond.

Source: Webster's Revised Unabridged Dictionary (1913)