digestive

Concise Oxford English Dictionary © 2008 Oxford University Press:
digestive/dʌɪˈʤestɪv/

▶adjective relating to the process of digesting food.

■ (of food or medicine) aiding or promoting the process of digestion.

▶noun

• 1 a food or medicine that aids or promotes the digestion of food.

• 2 Brit. a round semi-sweet biscuit made of wholemeal flour.

– derivatives
digestively adverb.

– origin ME: from OFr. digestif, -ive or L. digestivus, from digest-, digerere (see digest).