τρίειδος
From LSJ
λύπης ἰατρός ἐστιν ἀνθρώποις λόγος → for men reason cures grief, for men reason is a healer of grief, a physician for grief is to people a word, pain's healer is a word to man, logos is a healer of man's anguish, talking through one's grief is therapeutic
English (LSJ)
ον, (εἶδος IV) A composed of three ingredients, ἔμπλαστρος Aët.15.15: cf. ἑξάειδος, ἑπτάειδος, τετράειδος.