Likewise or similarly in other lexica: see the references at Photius mu206 Theodoridis. The headword is aorist middle infinitive of meili/ssw. It must be quoted from somewhere: the possibilities include two in Apollonius Rhodius (Argonautica 2.692 & 923), and cf. under alpha 4112.
cf. epsilon 502 for compound versions of both of these verbs.
cf. mu 842, mu 846.