Present passive participle(s) in the neuter nominative/accusative plural. An entry found in Synagoge zeta247, also in Photius and elsewhere; it derives from Hesychius zeta198 (but singular there).
A verb zugofore/w is very rare, and a different meaning of it, 'I draw by a yoke of oxen', may occur in Eusebius, Preparatio Evangelica 1.10 (quoting Herennius); that, however, was considered by H. Stephanus (see Thesaurus s.v.) to be a corruption of the form zeugofore/omai.
cf. generally zeta 187, zeta 189, zeta 192.