The headword is an adjective, mainly poetic, derived from o)i+zu/s (omicron 93); cf. also omicron 91. The headword is its feminine accusative singular, quoted from somewhere; see further, next note.
[1] Feminine accusative singulars, the headword one possibly extracted from the epigram quoted (see next note), though more probably from Oppian, Halieutica 1.707; see the scholia there. (For another instance see Herodotus 9.82.3.)
[2] Greek Anthology 6.117.3-4 (attributed to Pancrates), the blacksmith Polycrates dedicates his tools to Hephaestus; cf. Gow and Page (vol. I, 155), and (vol. II, 445), and further excerpts from this epigram at alpha 246 and rho 81.