cardō inis, m CARD-, a hinge, pivot and socket (of door or gate): postīs a cardine vellit, V.: (ianua) movebat Cardines, H.: facili patuerunt cardine valvae, Iu.: versato cardine Egreditur, opening the door, O.

— In astron., a pole: Extremusque adeo duplici de cardine vertex Dicitur esse polus, C., O.

—A boundary, limit: intra eum cardinem (imperii), i. e. Mount Taurus, L.

—Fig., a turning-point, crisis (poet.): tantus rerum, V.