īˈsädəˌmän, -_mən noun
or isod·o·mum -_məm
( -s )
Etymology: Latin & Greek; Latin isodomum, from Greek isodomon, neuter of isodomos of equal courses, from is- + domos course of masonry, house — more at timber
: masonry having blocks of equal length and thickness laid in courses so that each vertical joint of a course comes over the middle of a block just below