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Webster 1913 Edition

Noun.

[NL. See

(Chem.)

A supposed element claimed to have been discovered by R.Harmann.

See also: ilmenium

Ilmenium n ‎(genitive Ilmeniums, no plural)

See also: Ilmenium

ilmenium ‎(uncountable)

(obsolete) A supposed chemical element, later found to be a mixture of niobium and tantalum.