Likewise in other lexica, including Apollonius' Homeric Lexicon, and in the scholia to Homer, Iliad 13.707 (web address 1), where the headword occurs; see also Odyssey 18.375 (web address 2), and in later epic. It is attested only in the accusative singular, as here (though Herodian the Grammarian 3.2, p.758, posits the nominative w)=lc) and plural). LSJ entry at web address 3.
The gloss is the ordinary form of the word for furrow; cf. alpha 4433.