an·ti·cli·no·ri·um \ˌ ̷ ̷(ˌ) ̷ ̷ˌklīˈnōrēəm\noun (pluralanticlino·ria \-rēə\) Etymology: New Latin, from International Scientific Vocabulary anticline + New Latin -orium : a series of anticlines and synclines so grouped that taken together they have the general outline of an arch — opposed to synclinorium; see anticline illustration