1. the bottom or underneath surface or area of something
The lower side of the bridge was covered with moss.
O lado inferior da ponte estava coberto de musgo.
2. the less favorable or disadvantageous aspect of a situation
The lower side of this investment is the high risk involved.
O lado negativo deste investimento é o alto risco envolvido.
3. in anatomy, the ventral or inferior surface of a body part
The lower side of the tongue contains several veins.
O lado inferior da língua contém várias veias.