biological clock

noun

Definition of biological clock

  1. :  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

1955

First Known Use of biological clock

1955


BIOLOGICAL CLOCK Defined for English Language Learners

biological clock

noun

Definition of biological clock for English Language Learners

  • : a system in the body that controls the occurrence of natural processes (such as waking, sleeping, and aging)


Medical Dictionary

biological clock

noun

Medical Definition of biological clock

  1. :  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


Learn More about biological clock


Seen and Heard

What made you want to look up biological clock? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

an alert or lookout

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • alphabet-magnets
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ