noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The downward curvature of leaves etc due to differential growth rates. countable, uncountable
2. 2
   A nastic movement which bends a plant part (e.g. a petal) outward. countable, uncountable

Etymology

From epi- + -nasty. By surface analysis, epi- + -nast + -y.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.