"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"
2. something determined in relation to something that includes it;
"he wanted to feel a part of something bigger than himself"
"I read a portion of the manuscript"
"the smaller component is hard to reach"
3. 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;