Eurythmia, æ, f. g. A beautie in the true forming and apt proportioning of members in beight and breadth. Euerie thing aunswering to his proportion: comely gesture.
Lewis and Short: Latin dictionary
eurythmĭa, ae, f., = eu)ruqmi/a, in architect., beautiful arrangement, proportion, harmony of the parts, Vitr. 1, 2; 6, 2.