dumb cane WORD ORIGIN noun a West Indian foliage plant, Dieffenbachia seguine, of the arum family, having yellow-blotched leaves that cause temporary speechlessness when chewed. Liberaldictionary.com
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 British Dictionary definitions for dumb-cane dumb-cane noun a West Indian aroid plant, Dieffenbachia seguine, chewing the stem of which induces speechlessness by paralysing the throat muscles Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012