Etymology of the English word tonus
the English word
tonusderived from the Latin word
tonus (tone, degree of light, shade; tone, pitch, note)
derived from the Medieval Greek word
tonos, τόνος
derived from the Greek word
teino, τείνω
Date
The earliest known usage of tonus in English dates from the 19th century.
Derivations in English
phototonusUsage
Word found in Modern English
