zebra-mulehttp://www.oed.com/dictionary/zebra-mule_n%3Ftab%3Dmeaning_and_usezebra mule, n.
First published 2018

zebra mulenoun

  1. 1841–
    A zebroid; spec. the offspring of a male zebra and female horse.
    1. 1841
      Equine mules..may be justly regarded as unable to continue their race: the Paris zebra mule likewise evinced an indifference, which..proved a similar state of organic inability.
      C. H. Smith, Natural History of Horses (Naturalist's Libr.: Mammalia XII) 343
    2. 1926
      Zebra mules’ found hardy stock for harness work.
      China Press (Shanghai) 16 June 4/1 (headline)
    3. 2016
      A cross between the male zebra and female horse is called a zorse, or zebra mule.
      D. C. Smith, Book Mules 25

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

zebra mule, n. was first published in 2018.