Biphasic, meaning having two phases, may refer to: *

Phase (matter) In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform. Examples of physical properties include density, index of refraction, magnetiz ...

, in the physical sciences, a biphasic system, e.g. one involving liquid water and steam *

Biphasic sleep Biphasic sleep (or ''diphasic'', ''bifurcated'', or bimodal sleep) is the practice of sleeping during two periods over the course of 24 hours, while polyphasic sleep refers to sleeping multiple times—usually more than two. Each of these is in ...

, a nap or siesta in addition to the usual sleep episode at night * Phase (pharmacology) *

Biphasic disease A biphasic disease is a disease which has two distinct phases or components. In clinically biphasic diseases, the phases are generally chronologically separated. In histopathologically biphasic tumors (also called biplastic tumors), there is neopl ...

* Biphasic formulations of oral contraceptive pills

See also