πλευρ-ά, ᾶς, ἡ,
={πλευρόν}, rib, rare in singular, βοὸς π. [[ 5th c.BC: Herodotus Historicus 4.64; παρὰ τὴν π. ἑκάστην 4th c.BC: Aristoteles Philosophus “Historia Animalium” 513b29 ] Refs 5th c.BC+]: plural, ribs, [[ [prev. author] “PA” 654b35. ] Refs]
__2 plural, generally, side of a man or animal, ἄλλοτ᾽ ἐπὶ πλευρὰς κατακείμενος, ἄλλοτε δ᾽ αὖτε ὕπτιος [[ 8th c.BC: Ilias Homerus Epicus “Illiad” 24.10 ] Refs 8th c.BC+]; of both sides, ἀνὰ πλευράς τε καὶ ὤμους [[ 23.716; οὐρῇ δὲ πλευράς τε καὶ ἰσχία ἀμφοτέρωθεν μαστίεται 20.170, compare 8th-7th c.BC: Hesiodus Epicus “Scutum Herculis” 430, 4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 71, “Eu.” 843 (Lyric poetry)] Refs 8th c.BC+]: singular, also, of one side, [[ 5th c.BC: Sophocles Tragicus “Oedipus Coloneus” 1260, “Aj.” 834, etc.] Refs 5th c.BC+]; a side of beef, etc., [[ “PCair.Zen.” 381.5 (3rd c.BC, written πλερά)] Refs 3rd c.BC+]: the plural form is variant in [[ 5th c.BC: Euripides Tragicus “Hecuba” 826. ] Refs 5th c.BC+]
__II side, of things and places, νηὸς πλευραί [[ 6th c.BC: Theognis Elegiacus 513; χωρίου 5th-6th c.BC: Plato Philosophus “Sisyphus” 388e ] Refs 6th c.BC+]; [Πακτωλοῦ] [[ 2nd c.AD: Dionysius Periegeta 833 ] Refs 2nd c.AD+]; of an army, αἱ π. τοῦ πλαισίου [[ 5th-6th c.BC: Xenophon Historicus “Anabasis” 3.4.22, compare 28, 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Marius” 25, etc.; παρὰ π. τινὶ εἶναι 2nd c.BC: Polybius Historicus 5.26.6 ] Refs 5th c.BC+]; παρὰ π., opposed to κατὰ κεφαλήν, [[ “IG” 22.463.72 ] Refs]
__III in Mathematics texts, side of a triangle or other figure, [[ 5th c.BC: Antipho Sophista 13, 5th-6th c.BC: Plato Philosophus “Timaeus” 53d, 54c, etc.: especially ] Refs 5th c.BC+]