What is Or?

Legal Definition
A term used in heraldry, and signifying gold; called "sol-' by some heralds when it occurs in the arms of princes, and "topaz"' or "carbuncle" when borne by peers. Engravers represent it by an indefinite number of small points. Wharton.
Legal Definition
This syllable in the termination of words has an active signification, and usually denotes the doer of an act; as, the grantor, he who makes a grant; the vendor, he who makes a sale; the feoffor, he who makes a feoffment. Litt. s. 57; 1 Bl. Com. 140, n.
-- Bouviers Law Dictionary