The Collaborative International Dictionary of English v.0.48:
noncarbonated \noncarbonated\ adj. not having supersaturated carbon dioxide in solution; not carbonated; -- of beverages. [Narrower terms: noneffervescent (vs. effervescent) ] Syn: uncarbonated. [WordNet 1.5]WordNet (r) 3.0 (2006):
noncarbonated adj 1: not having carbonation [syn: {noncarbonated, uncarbonated]