θερμαντήρ
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
ῆρος, ὁ, A kettle or pot for boiling water, Poll.6.89, 10.66.
German (Pape)
[Seite 1201] ῆρος, ὁ, der Wärmer, der Kessel, Poll. 6, 89.
Greek (Liddell-Scott)
θερμαντήρ: ῆρος, ὁ, λέβης πρὸς θέρμανσιν ὕδατος, Πολυδ. Ϛ΄, 89, Ι΄, 66.