Same entry, according to Adler, in the Ambrosian Lexicon.
The headword is a noun derived from the verb fhmi/zw (phi 271). For the (commonplace) gloss see phi 269.
The headword is twice mentioned by ps.-Herodian, and its accusative case is differently glossed in the Etymologicum Gudianum, but it is not attested outside lexicography before the 13th century.