often attributive
: any of a family of genes that undergo mutation to oncogenes and especially to some commonly linked to human cancers (as of the colon, lung, and pancreas)

Word History

Etymology

ra(t) entry 1 + s(arcoma); from the initial isolation of such genes in rat sarcomas

First Known Use

1982, in the meaning defined above

Time Traveler
The first known use of ras was in 1982

Dictionary Entries Near ras

Cite this Entry

“Ras.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ras. Accessed 13 Jul. 2024.

Medical Definition

ras

noun
often attributive
: any of a family of genes that undergo mutation to oncogenes and especially to some commonly linked to human cancers (as of the colon, lung, and pancreas)
ras oncogenes
ras proteins
Etymology

rat sarcoma

Love words? Need even more definitions?

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