Extrinsic rhythm refers to a type of rhythm that is influenced by external factors, such as environmental cues. Synonyms for extrinsic rhythm include environmental rhythm, exogenous rhythm, and non-endogenous rhythm. These terms all describe a rhythm that is not controlled by the body's internal clock, but rather by external stimuli such as light, temperature, or food availability. Another synonym for extrinsic rhythm is zeitgeber rhythm, which refers to the body's response to a specific environmental cue that serves as a timekeeper for the body's circadian rhythms. Understanding the various synonyms for extrinsic rhythm is essential for researchers and medical experts who study the body's natural cycles and rhythms.