This article is an attempt to analyse the dialectal terminological microsystem „stomach” – „belly”, applying the structural-diachronic method. The terms for these two notions form a microsystem because they are interdependent. The author describes the geographical distribution of the terms, their origin, their chronological succession on the Daco-Romanian territory. The analysed microsystem is a dynamic one, it is in a continuous process of evolution and the history of one term depends on the history of the other terms of the system.