Ο
Ο ο, sixteenth (later fifteenth) letter in Gr. alphabet : as numeral ό = 70 , but <*>o = 70 , 000 . The name of the letter was οὖ, Cra. 414c , al., Callias ap. 10.453d , ap. eund. 10.454f , AP 9.385 ( Gramm.): this name was in Plato's time pronounced like the letter itself, Cra. 393d ; ο scanned long, 33.4 ; τὸ ο’ (v.l. ου<*>)
A). στοιχεῖον s.v. Φιλοξένου γραμμάτιον ; later called ὂ μικρόν ( Epim. 209 , Can. 13 ), little or short o, opp. ὢ μέγα great or long o.