monophasic

adjective

having one stage

Wiktionary

adj

Etymology: Etymology tree Proto-Indo-European *mender. Proto-Hellenic *mónwos Ancient Greek μόνος (mónos) Ancient Greek μονο- (mono-)der. English mono- English phase Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ik English -ic English phasic English monophasic From mono- + phasic.

of, related to or affected with monophasia
having a single phase