LSJ
ἡ, fem. of *πλυντήρ, washerwoman, IG1². 473, Poll. 7.37; Πλύντριαι, name of a Satyric drama by Sophocles and of a comedy by Philyllius.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ἡ, fem. von πλυντήρ, Wäscherin, Poll. 7.37.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)