πωλίον

τό
A. pony, Ar. V. 189, Pax 75, And. 1.61, Arist. GA 748a29; also, a young elephant, Ael. NA 3.46.
II. the membrane round the foal in the uterus, Arist. HA 605a6.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project