Definify.com

Webster 1913 Edition

Noun.

[Akin to Sw.

murken

putrefied, Icel.

morkinn

putrid.]

A beast that has died of disease or by mischance.

[Obs.]

Bp. Hall.

Noun.

[L. mortuus, dead, and kin, kind.]

Among hunters, a beast that has died by sickness or mischance.

morkin ‎(plural morkins)

(obsolete) An animal that has died of disease or by mischance.
- Bishop Joseph Hall
  Could hee^[sic] not sacrifice / Some sorry morkin that unbidden dies, / Or meagre heifer, or some rotten ewe, […]