bipolar

形容词 bipolar:

1. of or relating to manic depressive illness
2. of, pertaining to, or occurring in both polar regions
3. having two poles

bi.po.lar

adj.（形容词）
Relating to or having two poles.
两极的：关于两极的或有两极的
Relating to or involving both of the earth`s polar regions.
南北两极的：关于或涉及地球两极地区的
Having two opposite or contradictory ideas or natures:
两极世界的：有两种相反或矛盾的见解或性质的：
例句：
the bipolar world of the postwar period.
战后的两极世界

Biology Having two poles or opposite extremities:
【生物学】 有两极或相反极端的：
例句：
a bipolar neuron.
两极神经原

Psychology Relating to a major affective disorder that is characterized by episodes of mania and depression.
【心理学】 双向(感情性)障碍的：与主要由感情引起的精神失常有关的，其特点为躁狂与抑郁并发

【引伸】
bi.polar.ity