They are a pair of decks connected by a shaft that allows them to independent movements. Hinge, hinge, pernio. Especially used in doors and windows. Joint that joins the two leaflets of the lamellibranchs (oysters, mussels, clams). In medicine, it is each one of the sites of the spine where there is a change of curvature. Craniocervical hinge, hinge, hinge cervicaldorsal or cervicotoraxica there are lumbar and lumbosacral hinge. It is also the part of the saddle which allows you to attach brackets to the apéro or mount; also said it Stirrup. In geology is a distortion or ripple on the rocks, also called pleats or folds. In Botany is one of the many common names having the mastic tree or tree of turpentine, which also told quemaculo, Horn, Horn, cornicabra. Its scientific name is Pistacia terebinthus of the Anacardiaceae family.