[1] The headword is accusative singular of the adjective e(teralkh/s. Same or similar glossing in other lexica, beginning with Hesychius, and also in a scholion on Homer, Iliad 8.171, where it occurs (web address 1). See further, next note
[2] This phrase occurs five times (accusative case) in Homer, including Iliad 8.171 (see n.1). For the present gloss cf. a scholion on Iliad 7.26 (web address 2) -- but it is the lexicographer who, oddly, limits the scope to cavalry.