OFr riule < L. rēgula, straight stick, bar, ruler, pattern.
- That which is established as a principle, standard or directory; that by which anything is to be adjusted or regulated, or to which it is to be conformed.
- In arithmetic and algebra, a determinate mode prescribed for performing any operation and producing a certain result.
rule [-s] v
OFr riuler < L. rēgulāre, to regulate.
- To govern the movements of things; to conduct; to manage; to control.