PHOTOTONUS


Meaning of PHOTOTONUS in English

fōˈtät ə nəs noun

Etymology: New Latin, from phot- + tonus

: tonic condition (as of musculature) resulting from exposure to particular conditions of lighting

phototonus in plants usually results in curvature towards a source of light

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.