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)
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“Ras.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ras. Accessed 20 Jun. 2026.
Copy CitationMedical Definition
ras
nounoften 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
Noun
rat sarcoma
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