Consisting of or relating to two distinct phases or stages, commonly used in medical and scientific contexts to describe processes with two clear parts.
From 'di-' (two) and 'phasic' (relating to phases). This adjectival form emphasizes the characteristic of having two separate, often sequential, phase structures.
Bipolar disorder was once called 'diphasic illness'—doctors named it for the two contrasting mood phases because ancient psychiatrists didn't realize it could be more complex than that!
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