Definition of phasic in English:

phasic

adjective

  • 1Relating to a phase or phases.

    1. 1.1Physiology Characterized by occurrence in phases rather than continuously.
      ‘phasic and tonic stretch reflexes’
      • ‘These phasic values of blood pressure can be recorded accurately using modern transducers (electronic measuring devices) connected to catheters (fine tubes) inserted into arteries.’
      • ‘In addition to several specific tasks concerning the components of tonic and phasic alertness and selective, divided, and sustained attention, we presented a working memory test.’
      • ‘We measured both tonic and phasic heart rate dimensions.’
      • ‘Presumably, this airway collapse is due to falling pharyngeal muscle tone as the phasic afferent breathing-associated neural drive to these muscles declines as a central apnea develops.’
      • ‘Davidson has further emphasized that ‘affective chronometry’, or individual differences in tonic activation and phasic reactivity in this circuit, play an important role in governing different aspects of anxiety.’

Pronunciation

phasic

/ˈfāzik/