Same entry in Hesychius pi1670, the Synagoge, and Photius, Lexicon pi673 Theodoridis. The headword is present participle, masculine nominative singular, of the very rare Attic verb periere/ttw. It must be extracted from somewhere; perhaps from its only extant attestation outside these lexica, in Cyril of Alexandria's Paschal Letters (PG 77.561).