单词：heliotropism
音标：[.hi:li'ɒtrәpizm] ；
n. 向日性, 趋日性
[化] 向日性
[化] 向日性
n. an orienting response to the sun
词型变化：名词复数形式 : heliotropisms
heliotropism的用法和样例：
词汇搭配
- negative heliotropism背日性,负向日性...
- transverse heliotropism横向日性
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