1. The smaller denomination of currency in a monetary system, typically worth a fraction of the major unit
The cent is the minor unit of the US dollar.
O centavo é a unidade menor do dólar americano.
2. In measurement systems, a subdivision of a larger unit used for precise calculations
Millimeters are minor units in the metric system.
Os milímetros são unidades menores no sistema métrico.
3. In music theory, a subdivision of time in a composition
The minor unit of rhythm is the sixteenth note.
A unidade menor do ritmo é a semicolcheia.