noun 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
noun something determined in relation to something that includes it
noun (grammar) a word or phrase or clause forming part of a larger grammatical construction
Synonymsgrammatical constituent
noun an abstract part of something
adjective constitutional in the structure of something (especially your physical makeup)
Similaressential
Source: WordNet 3.1, Princeton University