You searched for: “hyponasty
1. The state of growth in a flattened structure in which the under surface grows more vigorously than the upper side.
2. An upward bending of leaves or other plant parts, resulting from growth of the lower side.

In plant physiology, the state in which more vigorous growth occurs in the lower surface of an organ, such as a young fern frond, causing an upward curvature.

This entry is located in the following units: hypo-, hyp- (page 9) nastic, -nastic; nasty, -nasty; -nastism + (page 1)