The Collaborative International Dictionary of English v.0.48:

Ekabor \Ek"a*bor`\ ([e^]k"[.a]*b[=o]r`), Ekaboron \Ek"a*bo"ron\
   (-b[=o]"r[o^]n), n. [G., fr. Skr. [=e]ka 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]