exudatePronunciation: /ˈɛgzjʊdeɪt/Definition of exudate noun 1 Medicine a mass of cells and fluid that has seeped out of blood vessels or an organ, especially in inflammation. 2 Botany & Entomology a substance secreted by a plant or insect. Origin: late 19th century: from Latin exsudat- 'exuded', from the verb exsudareexudate in other Oxford dictionaries Definition of exudate in the US English dictionary