GNU Collaborative International Dictionary of English

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1.       
   Spathe , n. [L. spatha, Gr. : cf. F. spathe. See Spade for digging.] (Bot.) A special involucre formed of one leaf and inclosing a spadix, as in aroid plants and palms. See the Note under Bract, and Illust. of Spadix.
   1913 Webster
   ☞ The name is also given to the several-leaved involucre of the iris and other similar plants.
   1913 Webster