[ih-fip-ee-uh m]
noun, plural e·phip·pi·a [ih-fip-ee-uh] /ɪˈfɪp i ə/. Zoology.
  1. a thick shell, consisting of two chitinous plates, that encloses and protects the winter eggs of a cladoceran.

Origin of ephippium

1835–45; < New Latin < Greek ephíppion, noun use of neuter of ephíppios for putting on a horse, equivalent to ep- ep- + hípp(os) horse + -ios adj. suffix
Related formse·phip·pi·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ephippium

Historical Examples of ephippium