Biphasic

A biphasic system is one which has two phases.


 * In the physical sciences, a liquid water and steam system would represent a biphasic system. See phase (matter).
 * In chronobiology, biphasic sleep refers to a nap or siesta in addition to the usual sleep episode at night. Monophasic sleep means just one sleep episode per day.
 * In psychiatry it may refer to a sigmoidal curve that goes downward as the axis increases because a competing behavior is impeding.  This competing behavior is called stereotypy.  Stereotypy is when an individual or an animal do simple tasks over and over (ex: experimental rat making circles for several hours).
 * Biphasic disease