LSJ
or προπεῖν, contr. aor. inf. of προπίνω used as Subst., a drink or snack taken before a meal, ΄cocktail΄, Mart. 12.82.11, Petron. 28 (leg.
propin esse), CIL 5.5272.13, 25 (Comum), 4449.34 (Brixia).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)