Liddell-Scott-Jones

προοίμιον (prooimion) a retort ^G:N-N

προοίμιον-ον, τό,

Trag. contraction φροίμιον (see. below): (οἶμος):— opening, introduction; in Music, prelude, overture, [Refs 5th c.BC+]; in Epic dialect poems, proëm, preamble, [Refs 5th c.BC+]; in speeches, exordium, [Refs 5th c.BC+]; προοιμίοις ἡδονῆς with prefaces about pleasure, [Refs 5th c.BC+]

__2 metaphorically of any prelude or beginning, φροίμιον χορεύσομαι [Refs 4th c.BC+]; φροιμίοις [δυσφροιμίοις][Refs]; λόγους.. μηδέπω 'ν προοιμίοις only just beginning, [Refs]; εἴ τι τοῦδε φ. ματᾷ any part of this presage, [Refs 5th c.BC+]; of premonitory symptoms of disease, [Refs 4th c.AD+]
__II hymn or short poem, such as those attributed to Homer, Ἀπόλλωνος [Refs 5th c.BC+]; φροίμιον Ἀντιλόχου (perhaps Ἀρχιλόχου) [Refs 3rd c.BC+]