What does phasic mean?
Phasic is an adjective meaning that something occurs in phases, or in distinct stages of a larger process. It is especially common in technical language for biological, physiological, and pharmacological activity. A phasic muscle contraction, for example, occurs as part of a repeating cycle, unlike a sustained contraction that remains active continuously. The word can also describe signals or other phenomena whose intensity changes periodically. In linguistics, phasic can refer to phases in the production or analysis of speech. Phasic should not be confused with chronic, which describes a condition that is persistent or long-lasting. The word is useful because it captures the idea of staged, cyclical variation without implying that the process is entirely irregular or continuous.
adjectiveRelating to phases or occurring in distinct stages of a process. In biology and physiology, it describes activity or change that follows a cyclical pattern rather than remaining constant.
- Occurring in distinct phases or stages of a process.
- In biology or physiology, relating to cyclical changes or rhythmic phases of activity.
- In linguistics, relating to a phase or stage in the development or analysis of a linguistic unit.
"The drug's phasic effects are most noticeable during the active phase of its action."
"Phasic contractions alternate with periods of relaxation in the muscle."
"The researchers distinguished phasic changes in the signal from sustained baseline activity."
Phasic is the technical word for a process that rises and falls in recognizable stages rather than proceeding at one steady rate.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does phasic come from?
Phasic was formed in English by adding the suffix -ic to phase. Phase comes through Latin phasis from Greek phasis, meaning an appearance or stage of development, ultimately associated with the Greek verb phainein, “to show.” Related English words such as phenomenon and epiphany belong to the same broad Greek etymological family.
Related word forms
How phasic is actually used
Phasic is primarily a technical term used in biology, physiology, pharmacology, and linguistics. It is more precise than simply saying that something varies, because it emphasizes distinct stages or phases.
Easily confused with phasic
Phase is a noun referring to a stage or period in a process, while phasic is an adjective describing something occurring in stages or following a cyclical pattern.
Chronic means persistent or long-lasting, whereas phasic describes activity that varies according to distinct stages or phases.