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单词 geotropism
释义 geotropism
n. plant growth in relation to gravity.
Phrases and idioms
negative geotropism the tendency of stems etc. to grow away from the centre of the earth. positive geotropism the tendency of roots to grow towards the centre of the earth.
Derivatives
geotropic adj.
Etymology: GEO- + Gk tropikos f. trope a turning f. trepo to turn
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