[eka-] comb form [ISV, fr. Skt eka one--more at one]: standing or assumed to stand next in order beyond (a specified element) in the same family of the periodic table--in names of chemical elements esp. when not yet discovered "eka-lead is the hypothetical element 114"
EKA-
Meaning of EKA- in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012