ὑπόφαυσις · hypophausis — LSJ
narrow opening, in the bridge across the Hellespont, Hdt. 7.36; in a testudo, Ph. Bel. 99.39; αἱ θυρίδες δικτυωταί, ὑποφαύσεις κύκλῳ LXX Ez. 41.16.
ὑποφαύσιας was read for ὑποφάσιας in Hp. Prog. 2 by Artemidorus and Dioscurides ap. Gal. 18(2).52, but rejected by Gal. l.c.