κοίλωσις
From LSJ
Οἱ βασιλεῖς τῇ ἐγκυκλοπαιδείᾳ, αὐτὴ τοῖς βασιλεῦσι (Salamanca inscription) → The kings for the university, and the university for the kings
English (LSJ)
εως, ἡ,
A cavity, Hp.Carn.15, Sor.1.82; hollowing out, of flutes, Nicom.Harm.4,10 (pl., κοιλιώς- codd.).
German (Pape)
[Seite 1467] ἡ, richtigere Lesart für κοιλίωσις Nicom. Harm. p. 172.