internal clock
Americannoun
Etymology
Origin of internal clock
First recorded in 1955–60
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
During adolescence, the body's internal clock naturally shifts later, meaning teenagers tend to feel alert later at night than adults do.
From Science Daily • Mar. 11, 2026
My internal clock wherever I am just knows it’s 4 p.m. and I get a little sad.
From Los Angeles Times • Jul. 25, 2025
When it is bright, our internal clock feels we should be awake.
From BBC • Apr. 16, 2025
Additionally, disruptions to the body's internal clock can affect astronaut's sleeping and eating cycles.
From Salon • Mar. 15, 2025
His listen-and-learn switch had been turned on, and his own internal clock was ticking.
From "The View From Saturday" by E.L. Konigsburg
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
