Dumb cane Meaning, Definition & Usage
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noun an evergreen plant with large showy dark green leaves; contains a poison that swells the tongue and throat hence the name
Dieffenbachia sequine; mother-in-law plant; mother-in-law's tongue.
WordNet
Definitions
(Bot.) , a west Indian plant of the Arum family (Dieffenbachia seguina ), which, when chewed, causes the tongue to swell, and destroys temporarily the power of speech.