προσωπίδιον
From LSJ
τούτων γάρ ἑκάτερον κοινῷ ὀνόματι προσαγορεύεται ζῷον, καί ὁ λόγος δέ τῆς οὐσίας ὁ αὐτός → and these are univocally so named, inasmuch as not only the name, but also the definition, is the same in both cases (Aristotle, Categoriae 1a8-10)
English (LSJ)
τό, Dim. of πρόσωπον, Ar.Fr.264, Stud.Pal. 22.56.23 (iii A.D.), Maria ap.Zos.Alch.p.157 B.