Sense

1. any cup-shaped hollow
2. the suckers on the arms, of the polypus
3. the socket of the hip-joint

Examples

• νῦν γὰρ ἐν ἄρθροισ τοῖσ ἡμετέροισ στρέφεται χαλαρὰ κοτυληδών. (Aristophanes, Wasps, Episode, anapests12)

Source: Henry George Liddell. Robert Scott. "A Greek-English Lexicon". revised and augmented throughout by. Sir Henry Stuart Jones.