The headword o)dmh/, which has the same or similar glossing in other lexica (references at Photius omicron35 Theodoridis), occurs in Homer, Herodotus, Pindar, and other authors; Theodoridis, on no discernible basis, regards it as quoted in this instance from Homer, Odyssey 5.59. The second gloss o)smh/ is the Attic form of the same noun, according to Phrynichus (cf. omicron 696).
For related verb forms, see omicron 50, omicron 51, omicron 52, omicron 67, omicron 72, omicron 73, omicron 74, omega 30.