eka-boronWiktionary 原文英美构词拆解eka-前缀+boron词干eka-(chemistry) Used to form prototype names for as-yet undiscovered elements, when prepended to the known element above them in the same group of the periodic table.词源说明From eka- + boron: the name given by Dmitri Mendeleev to the then undiscovered element at the position of scandium in his periodic table.释义名词noun1(chemistry) scandium