œstrus

œstrus (countable and uncountable, plural œstruses or œstri)

1. Obsolete form of oestrus.
   • 1903, Francis H[ugh] A[dam] Marshall, The Œstrous Cycle and the Formation of the Corpus Luteum in the Sheep (Philosophical Transactions of the Royal Society of London, series B, volume 196), London: […] [F]or the Royal Society by Dulau and Co., […], page 67:

     Œstrus was noted in a Black-faced ewe (not a virgin) in the beginning of February, and the ewe was served by a ram of its own breed.

• Souters, Strouse, estrous, ousters, rousest, sestuor, sourest, souters, toruses, tousers, trouses, trousse, tussore

French Wikipedia has an article on:

œstrus

Wikipedia ^fr

From Ancient Greek οἶστρος (oîstros).

• IPA^(key): /ɛs.tʁys/

œstrus m (plural œstrus)

1. oestrus, œstrus, estrus

• “œstrus”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.