circadian

[ sur-key-dee-uh n, -kad-ee-, sur-kuh-dee-uh n ]
/ sɜrˈkeɪ di ən, -ˈkæd i-, ˌsɜr kəˈdi ən /

adjective

noting or pertaining to rhythmic biological cycles recurring at approximately 24-hour intervals.

Origin of circadian

1955–60; < Latin circā about + di(ēs) day + -an

Example sentences from the Web for circadian

British Dictionary definitions for circadian

circadian
/ (sɜːˈkeɪdɪən) /

adjective

of or relating to biological processes that occur regularly at about 24-hour intervals, even in the absence of periodicity in the environment See also biological clock

Word Origin for circadian

C20: from Latin circa about + diēs day

Medical definitions for circadian

circadian
[ sər-kādē-ən, -kădē-, sûr′kə-dīən, -dē- ]

adj.

Relating to biological variations or rhythms with a cycle of about 24 hours.