a West Indian foliage plant, Dieffenbachia seguine, of the arum family, having yellow-blotched leaves that cause temporary speechlessness when chewed.
Origin of dumb cane
First recorded in 1690–1700
Also called dumb plant, mother-in-law plant.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019