English Reference
Noun

subunit

n. countable
C1 Advanced US /ˌsəbˈjunɪt/ sub·unit UK spelling subunit's, subunit's

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.


SIMPLE

The company divided the project among each subunit.

CONTEXTUAL

The virus is composed of several protein subunits that must assemble correctly to become infectious.

COMPLEX

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.

Some of them have all 12 subunits, as expected, but others are missing two subunits, leaving them with only 10 subunits.

Phys.org· 20 Aug 2026
This entry
Level C1 · Advanced
Frequency Occasional
Updated