The New International Encyclopædia/Concomitance

CONCOM′ITANCE (ML. concomitancia, from Lat. concomitari, to accompany, from com-, together + comitari, to accompany, from comes, companion), Sacramental. In the Roman Catholic Church, a term which implies that the body and blood of Christ, sacramentally, accompany each other, so that under either form, whether wine or bread, both are sacramentally received. Hence the laity in that communion, although they are not permitted to take the cup, still are held to receive Christ's body and blood.