The material which another is dissolved in a solution is called the solvent.

Here's a breakdown:

* Solution: A homogeneous mixture of two or more substances.

* Solute: The substance that gets dissolved.

* Solvent: The substance that does the dissolving.

For example, in a sugar-water solution:

* Sugar is the solute (it dissolves).

* Water is the solvent (it does the dissolving).