Constituent
WordNet
noun
(1) An artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
"Spare components for cars"
"A component or constituent element of a system"
(2) An abstract part of something
"Jealousy was a component of his character"
"Two constituents of a musical composition are melody and harmony"
"The grammatical elements of a sentence"
"A key factor in her success"
"Humor: an effective ingredient of a speech"
(3) (grammar) a word or phrase or clause forming part of a larger grammatical construction
(4) A member of a constituency; a citizen who is represented in a government by officials for whom he or she votes
"Needs continued support by constituents to be re-elected"