■ adjective
1》 having or relating to two poles or extremities.
↘(of a plant or animal species) of or occurring in both polar regions.
2》 (of psychiatric illness) characterized by both manic and depressive episodes, or manic ones only.
3》 (of a nerve cell) having two axons, one either side of the cell body.
4》 Electronics (of a transistor or other device) using both positive and negative charge carriers.
Derivatives
~ity noun