ἡ, a particular kind of
A articulation, where the surfaces are only slightly concave and convex, ib.736.
ἀρθρωδία: ἡ, ἰδιαίτερον εἶδος ἀρθρώσεως, καθ’ ἥν αἱ ἐπιφάνειαι εἶναι μόνον ὀλίγον κυρταὶ καὶ κοῖλαι, Γαλην. 2. 736.