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.
“Light is the way the internal clock knows what time it is.”
From The Wall Street Journal ● Oct. 5, 2026
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
Either by his internal clock or Chubs’s excited squeaks, Liam woke first.
From "The Darkest Minds" by Alexandra Bracken
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
