1. Residue; what is left after any process of separation or purification.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• residul,
• residous,
• residaul,
• resideut,
• residuos,
• residuam,
• eesiduum,
• desiduum,
• fesiduum,
• residuim,
• resideuum,
• residuumm,
• resideum,
• residuem,
• Aesidium,
• resiedum,
• residuums,
• desinhum,
• Esidium,
• Basideum

• resident.

The adjective form of the word "residuum" is "residual".

The plural of the "residuum" can be the "residua".

The singular of the "residuum" can be the "residuum".