noun
A portion
A machine part
A character in a drama
part is the general word for any of the components of a whole a part of one's life; a portion is specifically a part allotted to someone her portion of the inheritance; a piece is either a part separated from the whole a piece of pie or a single standardized unit of a collection a piece of statuary; a division is a part formed by cutting, partitioning, classifying, etc. the fine-arts division of a library; section is equivalent to division but usually connotes a smaller part a section of a bookcase; segment implies a part separated along natural lines of division a segment of a tangerine; a fraction is strictly a part contained by the whole an integral number of times, but generally connotes an insignificant part he received only a fraction of the benefits; a fragment is a relatively small part separated by or as if by breaking off a fragment of rock, a fragment of a song
See part in Webster's New World Roget's A-Z Thesaurus II
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