constituent

n. 1. The person or thing which constitutes, determines, or constructs. [ 1913 Webster ]

Their first composure and origination require a higher and nobler constituent than chance. Sir M. Hale [ 1913 Webster ]

2. That which constitutes or composes, as a part, or an essential part; a component; an element. [ 1913 Webster ]

We know how to bring these constituents together, and to cause them to form water. Tyndall. [ 1913 Webster ]

3. One for whom another acts; especially, one who is represented by another in a legislative assembly; -- correlative to representative. [ 1913 Webster ]

The electors in the district of a representative in Congress, or in the legislature of a State, are termed his constituents. Abbot. [ 1913 Webster ]

To appeal from the representatives to the constituents. Macaulay. [ 1913 Webster ]

4. (Law) A person who appoints another to act for him as attorney in fact. Burrill. [ 1913 Webster ]