Abnormal absorption of nutrients from the digestive tract

WordNet Word definitions in WordNet
n. abnormal absorption of nutrients from the digestive tract

Wikipedia Word definitions in Wikipedia
Malabsorption is a state arising from abnormality in absorption of food nutrients across the gastrointestinal (GI) tract . Impairment can be of single or multiple nutrients depending on the abnormality. This may lead to malnutrition and a variety of anaemias ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1879, from mal- + absorption .

Wiktionary Word definitions in Wiktionary
n. The state arising from abnormality in digestion or absorption of food nutrients across the gastrointestinal tract.