zebra-poisonhttp://www.oed.com/dictionary/zebra-poison_n%3Ftab%3Dmeaning_and_usezebra poison, n.
Revised 2018

† zebra poisonnoun

Obsolete.
  1. 1871–74
    Any of various South African tree spurges (genus Euphorbia) whose milky latex was formerly used by local hunters to poison waterholes used by wild mammals.
    1. 1871
      Zebra Poison... Its milky juice is highly poisonous, whole herds of zebras having been killed by branches of it being placed in the water which they drank.
      J. Smith, Domestic Botany 257
    2. 1874
      Zebra-poison. The South African Euphorbia arborea.
      J. Lindley & T. Moore, Treasury of Botany (revised edition) Supplement 1352/2

Originally published as part of the entry for zebra, n.

zebra, n. was revised in June 2018.