circadian
|cir-ca-di-an|
C1
🇺🇸
/sɜːrˈkeɪdiən/
🇬🇧
/sɜːˈkeɪdiən/
24-hour cycle
Etymology
Etymology Information
'circadian' originates from Latin, specifically the word 'circa' meaning 'around' and 'diem' meaning 'day'.
Historical Evolution
'circa' and 'diem' combined to form the modern English word 'circadian'.
Meaning Changes
Initially, it meant 'around a day', and this meaning has largely remained the same in modern usage.
Meanings by Part of Speech
Adjective 1
relating to biological processes that occur on a roughly 24-hour cycle, even in the absence of external cues.
The circadian rhythm regulates sleep-wake cycles.
Synonyms
Antonyms
Last updated: 2025/02/16 05:06