co·​he·​sin kō-ˈhē-sən How to pronounce cohesin (audio)
plural cohesins
: a ring-shaped protein complex that produces cohesion between sister chromatids and mediates their separation during cell division and that also plays a role in repairing damaged replicated DNA and regulating genetic transcription
At the cell-cycle stage known as anaphase, cohesins are cleaved and cohesion between sister chromatids dissolves, triggering their segregation.Paul Megee

Word History

First Known Use

1998, in the meaning defined above

Time Traveler
The first known use of cohesin was in 1998

Dictionary Entries Near cohesin

Cite this Entry

“Cohesin.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!