8 letters · 12 points in Scrabble
adjective not normal; not typical or usual or regular or conforming to a norm
adjective departing from the normal in e.g. intelligence and development
adjective much greater than the normal
originFrom ab- + normal. First attested in 1835, replacing the earlier anormal and even earlier abnormous, from Latin abnormis (“departing from normal”), from either ab- (“away from”) + norma (“rule, norm”), or Ancient Greek ἀνώμαλος (anṓmalos).
Etymology from Wiktionary, CC BY-SA 3.0