This root form (lemma) is used in 2 different forms in the NT: λίτραν (AFS), λίτρας (AFP).
It is glossed in 2 different ways: ‘a litra_\add weight\add*’, ‘litra_\add weight\add*s’.
OET JOHN 12:3 Greek word=λίτραν (litran) Morphology=AFS English gloss=‘a litra_\add weight\add*’ SR GNT JOHN 12:3 word 7
OET JOHN 19:39 Greek word=λίτρας (litras) Morphology=AFP English gloss=‘litra_\add weight\add*s’ SR GNT JOHN 19:39 word 24