ω Inflection and μι Inflection.—There are two slightly different methods of inflecting verbs, the first according to the common, the second according to the μι system. The names ω-verbs and μι
a. In the ω inflection the tense-stem ends in the thematic vowel. To this form belong all futures, and the presents, imperfects, and second aorists showing the thematic vowel.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].