Geotropism

[dʒi'ɒtrәpizm]

解释:

(noun.) an orienting response to gravity.

厄纳校对--From WordNet

解释:

(n.) A disposition to turn or incline towards the earth; the influence of gravity in determining the direction of growth of an organ.

手打:卡尔

解释:

n. (bot.) tendency to growth downward.—adj. Geotrop′ic.

校对:普拉特