Noun
Oxford comma (plural Oxford commas)
(typography) The serial comma.
Synonyms: (UK & US) serial comma, (US) Harvard comma
There are people who embrace the Oxford comma and those who don't, and I'll just say this: never get between these people when drink has been taken. Lynne Truss
Author Philip Pullman complained the new 50p coin is missing an Oxford comma - only to be lectured about its correct usage on social media. Source: Internet
The Oxford comma is what separates us from the animals.” Source: Internet