Calque of Latin Ursa Maior (“greater she-bear”).
Ossa Mayor f
- (astronomy) Ursa Major
c. 1250, Alfonso X, Lapidario, f. 29v:Et la eſtrella que es en cabo dela oreia delantera dela oſſa mayor a poder ſobreſta piedra ⁊ della recibe la fuerça ⁊ la uertud.- And the start that is on the front ear of the Great Bear has power over this stone, and it receives its strength and virtue from it.