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mother-in-law plant

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noun
  1. dumb cane.
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dumb cane

noun
  1. a West Indian foliage plant, Dieffenbachia seguine, of the arum family, having yellow-blotched leaves that cause temporary speechlessness when chewed.
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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. 2018