geotropismWiktionary 原文构词拆分geo-前缀“earth”earth · geography+-tropism后缀(sciences) movement, turning. · (biology) growth towards.词源说明From geo- (“earth”) + -tropism, due to growth towards or away from the earth.释义（英文）名词 Noun(biology) The movement of a plant in response to gravity (either downwards or upwards).词族派生词（1）diageotropism