Π, π, πῖ, indecl.: sixteenth letter of Gr. alphabet. As numeral π41 = 80, but ̀̀, ̀̀π = 80, 000. π is the tenuis labial mute, related to the medial β and the aspirate φ. Changes of π in the Gr. dialects, etc.
2.in aeolic and ionic, it stands for the asp. φ, ἀμπί for ἀμφί, πανός for φανός, ἀπικέσθαι for ἀφικ-: in ionic it was retained in apostrophe before an aspirate, ἀπ᾽ ἡμῶν, ἐπ᾽ ἡμέρην, ὑπ᾽ ὑμῶν, etc.: on the contrary the aspirated form was preferred in attic, ἀσφάραγος for ἀσπάραγος, σφόνδυλος for σπόνδυλος.