biological clock

noun

: an inherent timing mechanism in a living system that is inferred to exist in order to explain the timing or periodicity of various behaviors and physiological states and processes

Examples of biological clock in a Sentence

Recent Examples on the Web

The system, designed by Lufthansa Technik for Bombardier, is a spectrum of 24 pre-programmed daylight settings to naturally speed up one’s biological clock. —Michael Verdon, Robb Report, 19 Mar. 2025

Wu advocates getting up, moving around and exposing yourself to natural light in the morning to regulate your body’s biological clock and boost energy levels. —Bryan Robinson, Forbes, 15 Mar. 2025

This is largely due to early school start times, which force teens to wake up before their biological clocks are ready. —Joanna Fong-Isariyawongse, The Conversation, 7 Mar. 2025

First, refining and validating these biological clocks across diverse populations is essential. —William A. Haseltine, Forbes, 26 Feb. 2025

Word History

First Known Use

1941, in the meaning defined above

Rhymes for biological clock

• aftershock
• antiknock
• arawak
• hollyhock
• interlock
• isopach
• manioc
• shuttlecock
• tomahawk
• weathercock
• alcock
• beanstalk

Kids Definition

biological clock

noun

: a mechanism that exists in living things and controls the timing of behaviors and bodily functions which occur in cycles

Medical Definition

biological clock

noun

: an inherent timing mechanism in a living system (as a cell) that is inferred to exist in order to explain various cyclical behaviors and physiological processes