What is Constituent ?
Constituent is (adj) (of a part) which goes to make up a whole The constituent parts of that sentence are subject, verb, and object. What are the constituent parts of an omelette?(noun) 1. a part which goes to make up a whole Before starting the experiment, make sure that all the chemical constituents are ready. 2. a person who may vote in a constituency A good MP tries to represent the views of his constituents. She has had a mass of letters from her constituents about airport noise.
source: Easier English, Student Dictionary Upper Intermediate Level