Biological clock may refer to:
- Circadian rhythm, living organisms' adaptations to solar related rhythms
- Age and female fertility
Famous quotes containing the words biological and/or clock:
“Man’s biological weakness is the condition of human culture.”
—Erich Fromm (1900–1980)
“Up the reputable walks of old established trees
They stalk, children of the nouveaux riches; chimes
Of the tall Clock Tower drench their heads in blessing:
“I don’t wanna play at your house;
I don’t like you any more.”
My house stands opposite, on the other hill,”
—William Dewitt Snodgrass (b. 1926)