Coined by French naturalist Georges Cuvier, from Ancient Greek μαστός (mastós, “breast”) + ὀδούς (odoús, “tooth”), from the similarity of the mammilloid projections on the crowns of the extinct mammal's molars.
- (obsolete) A taxonomic genus within the family Mammutidae – the mastodon, a type of mammoth; replaced by Mammut.
- (social media) A decentralized microblogging platform, part of the Fediverse.
- 2022 November 9, Amanda Hoover, “Twitter Users Have Caused a Mastodon Meltdown”, in Wired, ISSN 1059-1028:
- Since Musk bought the bird app last month, users are looking for ways to access Mastodon, the open source microblogging platform that isn’t quite Twitter but seems to be the closest thing to it, and they’re signing up for its many servers in droves.
Mastodon (plural Mastodons)