millerandage
/ˌmɪlərɒnˈdɑːʒ/(also millérandage) Winemaking
noun
A condition of vines in which both large and small grapes grow in the same bunch (the small grapes being seedless), owing to poor fertilization of the ovary.
Origin
1920s. From French millerandage from millerand, adjective designating small-berried grapes (1874; probably a derivative of Old French mil millet: compare French regional (eastern) milleran, milleret, Swiss French millerin, all denoting grapes of this type) + -age.