Replacement component

Wikipedia Word definitions in Wikipedia
A spare part , spare , service part , repair part , or replacement part , is an interchangeable part that is kept in an inventory and used for the repair or replacement of failed units. Spare parts are an important feature of logistics engineering and supply ...

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ He stood looking like a spare part , apparently waiting to be asked to sit down.

Wiktionary Word definitions in Wiktionary
n. A component of any manufactured goods, kept in reserve to replace one that fails; a spare.

WordNet Word definitions in WordNet
n. an extra component of a machine or other apparatus [syn: spare ]