cursor

Concise Oxford English Dictionary © 2008 Oxford University Press:
cursor/ˈkɜːsə(r)/

▶noun

• 1 a movable indicator on a computer screen identifying the point that will be affected by input from the user.

• 2 the transparent slide engraved with a hairline used to locate points on a slide rule.

– origin ME (denoting a runner): from L., ‘runner’, from curs- (see cursive).