mineralocorticoidPronunciation: /ˌmɪn(ə)rələ(ʊ)ˈkɔːtɪkɔɪd/Definition of mineralocorticoid noun Biochemistry a corticosteroid which is involved with maintaining the salt balance in the body, such as aldosterone. mineralocorticoid in other Oxford dictionaries Definition of mineralocorticoid in the US English dictionary