subunit
n. countable C1 Advanced US //ˌsəbˈjunɪt// sub·unit
n. a smaller part of a larger group or object. It works as its own piece but is still part of the whole system.
n. a distinct component or structural part of a larger complex or entity. Often refers to a specific protein molecule that joins with others to form a functional protein complex.
The company divided the project among each subunit.
The virus is composed of several protein subunits that must assemble correctly to become infectious.
By analyzing each individual subunit of the organization, the consultants identified specific inefficiencies that were not visible when looking at the corporation as a single entity.
Usage
Commonly used in biological, chemical, and organizational contexts to describe modular parts.