|(Bot.)||a poisonous tree (Euphorbia arborea) of the Spurge family, found in South Africa. Its milky juice is so poisonous that zebras have been killed by drinking water in which its branches had been placed, and it is also used as an arrow poison.|
See also: Zebra
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.