This root form (lemma) is used in 2 different forms in the NT: ἐχιδνῶν (GFP), ἔχιδνα (NFS).
It is glossed in 2 different ways: ‘a viper’, ‘of vipers’.
OET MAT 3:7 Greek word=ἐχιδνῶν (eⱪidnōn) Morphology=GFP English gloss=‘of vipers’ SR GNT MAT 3:7 word 16
OET MAT 12:34 Greek word=ἐχιδνῶν (eⱪidnōn) Morphology=GFP English gloss=‘of vipers’ SR GNT MAT 12:34 word 3
OET MAT 23:33 Greek word=ἐχιδνῶν (eⱪidnōn) Morphology=GFP English gloss=‘of vipers’ SR GNT MAT 23:33 word 3
OET LUKE 3:7 Greek word=ἐχιδνῶν (eⱪidnōn) Morphology=GFP English gloss=‘of vipers’ SR GNT LUKE 3:7 word 13
OET ACTS 28:3 Greek word=ἔχιδνα (eⱪidna) Morphology=NFS English gloss=‘a viper’ SR GNT ACTS 28:3 word 16