向こう性せいこうせいFreq.FrequencyTop 100,000Meanings1nountropismBiological term for directional growth or movement of an organism in response to an external stimulus, such as light or gravity.植しょく物ぶつの光ひかりに向むかう成せい長ちょうは、光ひかり向こう性せいと呼よばれる。The growth of plants toward light is called phototropism.
