Microcosm is a noun that refers to a thing regarded as encapsulating in miniature the characteristics of something much larger. 

Our word of the day has been with us since the 14th century. It’s derived from the Greek prefix M-I-C-R-O, which means ‘small,’ and Kosmos (COS mose) meaning ‘world’ or ‘order.’ Here’s an example of microcosm in use:

Our baseball team had become a microcosm for our country. Not only did we embody America’s belief in hard work and a ‘can do’ spirit, but we also believed in drinking lots of beer after victory was won.