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The Collaborative International Dictionary
Curvative

Curvative \Cur"va*tive\ (k?r"v?-t?v), a. (Bot.) Having the margins only a little curved; -- said of leaves.
--Henslow.

Wiktionary
curvative

a. (context botany English) Having the margins only a little curved; said of leaf. n. (context geometry English) (rfdef: English)