low-calorie

Cambridge Advanced Learner's Dictionary - 4th Edition
 

ˌ low- ˈ calorie / ˌləʊˈkæl. ə r.i /   / ˌloʊˈkæl.ɚ.i / adjective ( also low-cal , lo-cal , / ˌləʊˈkæl /   / ˌloʊ- / )

containing fewer calories (= units for measuring the amount of energy a food provides) than normal:

low-calorie drinks/snacks

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