|a mental health problem characterized by an alternation between extreme euphoria and deep depression|
|usage Though manic depression, manic-depressive are still often used by the general public, they are seen as having negative connotations. The preferred terms nowadays are bipolar disorder and experiencing bipolar disorder|
|a gadget; dingus; thingumbob.|
|the offspring of a zebra and a donkey.|
manic-depressive illness n.
See bipolar disorder.