The more abundant substance in a solution is called the solvent.

Here's a breakdown:

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

* Solvent: The substance that dissolves the other substance(s). It's typically present in a larger amount.

* Solute: The substance that gets dissolved in the solvent. It's typically present in a smaller amount.

Example:

In a sugar-water solution:

* Solvent: Water (H₂O)

* Solute: Sugar (C₁₂H₂₂O₁₁)

Water is the solvent because it's present in a larger amount and dissolves the sugar.