<em>Monounsaturated fats</em> are merely <em>fat molecules with one unsaturated carbon bond in the molecule, often called a </em><em>double bond</em> as well.
Oils containing these fats are usually fluid at ambient temperature, but when cooled, they begin to become solid.
<em>Olive, peanut and canola oil are instances</em> of oil forms containing mono-unsaturated fats.