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单词 orthotropism
释义 orthotropism Bot.|ɔːˈθɒtrəpɪz(ə)m|
[f. as next + -ism.]
The condition of being orthotropic; tendency to grow in a vertical direction, upwards or downwards.
1885Vines in Encycl. Brit. XIX. 61/1 Orthotropism is then mainly due to negative geotropism.
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