Similarly glossed in Photius, the Lexica Segueriana, the Ambrosian Lexicon (according to Adler), Apollonius the Sophist, and a scholion on Homer, Iliad 5.401 (where the neuter plural occurs). The headword is apparently quoted from some unknown source where it is used as feminine, to judge by the feminine gloss. The scholiast perhaps thinks that the second element of the compound is related to φαίνω "reveal"; LSJ connect it rather with θείνω "kill", φόνος "murder".
cf. omicron 56, omicron 57.