Unlike

Un*like" (?), a. 1. Not like; dissimilar; diverse; having no resemblance; as, the cases are unlike.

2. Not likely; improbable; unlikely. [Obsoles.]

Unlike quantities (Math.), quantities expressed by letters which are different or of different powers, as a, b, c, a², a³, xⁿ, and the like. -- Unlike signs (Math.), the signs plus (+) and minus (- ).