Minuartia mi·nuar·tia uncommon noun 1. mostly perennial herbs of northern hemisphere often with mat-forming habit; most often placed in genus Arenaria: sandworts Synonymsgenus Minuartia Related words Broader terms caryophylloid dicot genus Parts Caryophyllaceae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.