geotropism

/jee-o-truh-piz-uhm/US // dʒiˈɒ trəˌpɪz əm //UK // (dʒɪˈɒtrəˌpɪzəm) //

向地性,向地性运动,向地力,向地性的

Definitions

n.名词 noun

Thus I am now observing something about geotropism, and I had no idea a few weeks ago that this would have been necessary.
No phenomenon of tropic movement appears so inexplicable as that of geotropism.
The root is thus supposed to be characterised by "positive" and the shoot by "negative" geotropism.
Hence an agent which acts on the organ from outside, induces phototropic change earlier than variation in geotropism.
Further tests will be given later, to distinguish the phenomenon of Thermonasty from that of Thermo-geotropism.