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dia- +‎ geotropism


diageotropism (uncountable)

  1. (botany) The tendency of plant organs, such as roots, to assume a position oblique or transverse to a direction towards the centre of the Earth.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for diageotropism in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)