What is a reference to, or statement of, an object, course, distance, or other matter of description in a survey or grant reguiring or calling for a carresponding object, etc., on the land called?

call — (Amer. Land Law) A reference to, or statement of, an object, course, distance, or other matter of description in a survey or grant reguiring or calling for a carresponding object, etc., on the land. (Webster's 1913.)