rhombomere
/ˈrɒmbə(ʊ)mɪə/Embryology
noun
Each of a series of distinct segments (neuromeres), visible as bulges separated by grooves, into which the neural tube becomes divided in the region of the developing hindbrain in early vertebrate embryos.
Origin
Early 20th century. From rhombo- + -mere, after rhombencephalon.