"Sub-unit" Natural Recordings by Native Speakers
A sub-unit is a smaller division or part of a larger unit or organization, often within a larger system or hierarchy. It is a separate or minor unit, connected to or dependent upon a larger entity.
For example: "The company has two sub-units: marketing and sales."
In a mathematical context, a sub-unit can also refer to a unit that is part of a larger collection or a smaller scalar quantity, often measured in decimal powers of the base unit.
Example: "The kilogram (kg) is a sub-unit of the metric ton."
A smaller region within a larger geographical region, often depending on a larger region for support, administration or services.
Adjective - located or occurring south of the Sahara Desert, a vast desert in North Africa that divides the African continent into two distinct geographical and cultural regions. The term is used to describe countries, lands, or populations south of the Sahara, such as sub-Saharan Africa or sub-Saharan climate.