cf. generally omicron 1035, omicron 1036, pi 708.
The rare and late primary headword, unglossed, is in the accusative case in some manuscripts (favoured by Adler) -- and thus apparently quoted from somewhere -- but in the nominative in others (and in ps.-Zonaras).
[1] Adjective quoted from the simile in Homer, Iliad 21.257 (web address 1); cf. the scholia there, and lexica at Photius omicron735 Theodoridis.