Ekaboron

{ } n. [ G., fr. Skr. ēka one + G. bor, boron, E. boron. ] (Chem.) The name given by Mendelejeff in accordance with the periodic law, and by prediction, to a hypothetical element then unknown, but since discovered and named scandium; -- so called because it was a missing analogue of the boron group. See Scandium. [ 1913 Webster ]