- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ephippium
Indeed its relationship to the Siamese species is much closer than to the R. ephippium of Borneo.
It is in no way closely related to the large Bornean R. ephippium.