'Residuum' definitions:

Definition of 'residuum'

From: WordNet
noun
Something left after other parts have been taken away; "there was no remainder"; "he threw away the rest"; "he took what he wanted and I got the balance" [syn: remainder, balance, residual, residue, residuum, rest]

Definition of 'Residuum'

From: GCIDE
  • Residuum \Re*sid"u*um\ (-?m), n. [L. See Residue.] That which is left after any process of separation or purification; that which remains after certain specified deductions are made; residue. [1913 Webster]
  • "I think so," is the whole residuum . . . after evaporating the prodigious pretensions of the zealot demagogue. --L. Taylor. [1913 Webster]