UNLIKE

unlike. Unlike, a. not like, unlikely, improbable

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Un‐like″ (?), a. 1. 1. Not like; dissimilar; diverse; having no resemblance; as, the cases are unlike.
2. 2. Not likely; improbable; unlikely.
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 (-).