| 释义 |
he·liotro·pism
\ˌhēlēˈä.trəˌpizəm, ˈhēlēə.ˌtrōˌp-\ noun
Etymology: International Scientific Vocabulary heli- (I) + -tropism
: phototropism in which sunlight is the orienting stimulus (as in sunflower heads turning with the sun) — compare apheliotropism |