In obsolete|lang=en terms the difference between scan and cursory
is that
scan is (obsolete) to mount by steps; to go through with step by step while
cursory is (obsolete) running about; not stationary.
As a verb scan
is to examine sequentially, part by part.
As a noun scan
is an instance of scanning.
As an adjective cursory is
hasty; superficial; careless.