What term describes a combination of two or more substances where each retains its properties?

The term that describes a combination of two or more substances where each retains its properties is a mixture. In a mixture, the individual components maintain their distinct characteristics and can usually be separated by physical means. This is in contrast to a compound, where substances are chemically bonded and cannot retain their individual properties.

A solution, while also a type of mixture, involves one substance dissolving into another, resulting in a homogeneous mixture where the properties of the individual substances may not be identifiable. An emulsion, a specific type of mixture, refers to the combination of two immiscible liquids, such as oil and water, which requires an emulsifying agent to stabilize the mixture. This further illustrates how a mixture allows for the individuality of its components to remain intact while contributing to the overall combination.