Likewise or similarly in other lexica and some Homeric scholia: see the references at Photius mu263 Theodoridis, where the editor claims the source of the headword as Homer, Iliad 5.482 (me/mon' there: web address 1). Be that as it may, it is a first-person singular perfect form with o-grade of the vowel, from the root *mn- seen in me/nos and mai/nomai. Cf. a scholion on Homer, Iliad 12.304, where the third-person singular occurs (web address 2). See also mu 551, mu 552, mu 554.