A.joint, in masonry, IG1.322; in metal-work, Ph.Bel.77.39; ὁ προσιών, ἀπιὼν ἁ., front and back faces of blocks, IG 7.3073.106,112 (Lebad.), cf. 22.463.40: pl., fastenings of a door, E. Med.1315, Hipp.809; ἁ. χώματος λιθοσπαδής a fissure in the tomb made by tearing away the stones at their joining, S.Ant.1216; chink in the fitting of a door, “ἁρμῷ τὴν ὄψιν προσβαλεῖν” D.H.5.7, cf. Plu. Alex.3.
3. shoulder-joint, Hippiatr.34.