emplecton, i, n., = ἔμπλεκτον (lit., interwoven),
rubble-work , a sort of masonry in which the space between two walls is filled with broken stones and mortar , Plin. 36, 22, 51, § 171 ( Vitr. 2, 8, 7, as Greek).
·noun A kind of masonry in which the outer faces of the wall are ashlar, the space between being fil...
Webster's Dictionary of the English Language