πατελίς
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
ίδος, ἡ, a species of
A limpet, Sch. Opp.H.1.138.
Greek (Liddell-Scott)
πατελίς: -ίδος, ἡ, ἡ λεπάς, κοινῶς «πεταλίδα», Σχόλ. εἰς Ὀππ. Ἁλ. 1. 138.