RESIDUUM
Source: 566, 567
residuum. Residuum, n. the remains, or residue
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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. “I think so,” is the whole residuum . . . after evaporating the prodigious pretensions of the zealot demagogue. L. Taylor.