ras

noun, often attributive
\ ˈras How to pronounce ras (audio) \

Definition of ras

: 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)

First Known Use of ras

1982, in the meaning defined above

History and Etymology for ras

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

Keep scrolling for more

Learn More about ras

Statistics for ras

Look-up Popularity

Time Traveler for ras

The first known use of ras was in 1982

See more words from the same year

Keep scrolling for more

More Definitions for ras

ras

noun, often attributive
\ ˈras How to pronounce ras (audio) \

Medical Definition of ras

: 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

History and Etymology for ras

rat sarcoma

More from Merriam-Webster on ras

Spanish Central: Translation of ras

Comments on ras

What made you want to look up ras? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

an act or instance of returning to life

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

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