μέσ-αυλος · mes-aulos — LSJ
I the inner court, inside the αὐλή
in Hom. μέσσαυλος, ὁ, or μέσσαυλον, τό (gender unknown), prob. the inner court, inside the αὐλή, where cattle were put at night, Il. 11.548, 17.112, 657, 24.29; used of the cave of the Cyclops, Od. 10.435.
II the door between the αὐλή and the inner part of the house, mesauloe
Att. Prose and Com. μέταυλος (sc. θύρα), ἡ, the door between the αὐλή and the inner part of the house, Ar. Fr. 371; in full, μέταυλος θύρα Lys. 1.17; also θύραι μέσαυλοι E. Alc. 549; mesauloe, Vitr. 6.7.5.