διάτοιχος · diatoichos — LSJ
extending through the width of the wall, ὑπερτόναια ξύλινα δ. IG 2(2).463.57.
Subst. διάτοιχος (sc. λίθος), ὁ, bonding course or stone, ib. 11(2).144 A 57,97 (Delos, iv B. C.), 199 C 32 (iii B. C.), Milet. 7.56,57 (pl.), cf. Hsch.