Definition
Leaf curling is a distoration, puffing, and crinkling of a leaf resulting from unequal growth.
Etymology. 1447, metathesis of crulle (c.1300), probably from O.E. or from M.Du. krul "curly," from P.Gmc. *krusl-. The game of curling is from 1620; curlicue is from 1844, perhaps from the letter Q.