unit

noun

1. any division of quantity accepted as a standard of measurement or exchange"the dollar is the United States unit of currency"
2. an individual or group or structure or other entity regarded as a structural or functional constituent of a whole"they reduced the number of units and installations"
3. an organization regarded as part of a larger social group"the coach said the offensive unit did a good job"
4. a single undivided whole"an idea is not a unit that can be moved from one brain to another"
5. a single undivided natural thing occurring in the composition of something else"units of nucleic acids"
6. an assemblage of parts that is regarded as a single entity"how big is that part compared to the whole?"