ἄρθρον

ἄρθρον, τό, ([etym.] ἀραρίσκω)

A joint, Emp.17.22, etc.;

ἄρθρων πόνοι Hp. Aph.3.31

, al.;

ἅπαν κατ' ἄρθρον S.Tr.769

; κρᾶτα καὶ ἄρθρα the head and joints of the neck, Id.Ph.1208 (lyr., codd.); esp. the socket of the ankle-joint,

ὁ ἀστράγαλος ἐξεχώρησε ἐκ τῶν ἄ. Hdt.3.129

; in Hp.Art. I, al., ball of a joint, opp. socket ([etym.] κοτύλη), cf. Gal.18(2).487 (but socket in Hp.Loc.Hom.6);

μάρψας ποδός νιν ἄρθρον ᾗ λυγίζεται S.Tr.779

, cf. Ph.1202 (lyr.).

2 generally, of limbs, etc., esp. in pl., ἄ. ποδοῖν the ankles, Id.OT718, cf. 1032; of the legs,

βραδύπουν ἤλυσιν ἄρθρων προτιθεῖσα E.Hec.67

(lyr.); ἄ. τῶν κύκλων eyes, S.OT1270; ἄ. στόματος the mouth, E.Cyc.625;

θέναρ διῃρημένον ἄρθροις

lines,

Arist.HA493b33

; τὰ ἄ. alone, genitals, Hdt.3.87, 4.2, Arist.HA504b23, al; τὰ ἐντὸς ἄ. the internal organs, Mnesith. ap. Orib.8.38.7: metaph.,

ἄ. τᾶν φρενῶν Epich.250

: in sg., ἄρθρον τῆς φωνῆς vocal articulation, Arist.HA536a3.

II Gramm., connecting word, Id.Po.1457a6; esp. of the article, Id.Rh.Al.1435a35, Chrysipp.Stoic.2.45, D.H.Th.37, al.