islet
noun [ C ] uk/ˈaɪ.lət/ us/ˈaɪ.lət/
(ISLAND)
（小）岛
a small island
an islet in the San Blas archipelago 圣布拉斯群岛中的一座小岛
(CELLS)
medical specialized胰岛
one of many groups of cells in the pancreas that produce hormones such as insulin