noun
phototropism
Scientific term for growth or movement of an organism in response to light direction. Used in botany and biology.
植物の屈光性は、光の方向に応じて成長する性質です。
Phototropism in plants is the property of growing in response to the direction of light.
走光性 is phototaxis (movement of an entire organism toward or away from light), whereas 屈光性 is phototropism (directional growth).
Compound of 屈 (bend, yield) + 光 (light) + 性 (property, nature). A modern scientific coinage modeled on Western biological terminology.