νίπτρον · niptron — LSJ
water for washing, Poll. 10.78: mostly in pl., A. Fr. 225, E. Ion 1174, Hel. 1384, AP 12.68 (Mel.); παῖδες ν. ἔδοσαν κατὰ χειρῶν Philox. 2.39.
Νίπτρα, τά, the Bath Scene, title of play by Sophocles on the recognition of Odysseus by his nurse; also applied to Od. 19, Arist. Po. 1460a26, and to the Bath Scene in that book, ib. 1454b30.