noun
diurnality; daytime activity
Refers to the biological trait of being active during the day. Used as a noun in scientific or descriptive contexts.
多くの霊長類は昼行性を示す。
Many primates exhibit diurnality.
noun which may take the genitive case particle 'no'
diurnal
Used adjectivally with の to describe animals or behaviors that occur during the day. Common in biology and ecology.
This bird is a diurnal species.
Refers to crepuscular activity (dawn and dusk), contrasting with the full daytime activity of 昼行性.
Compound of 昼 (daytime), 行 (go, activity), and 性 (nature, -ity). A straightforward Sino-Japanese biological term.