Meaning of RAS in English

I. ˈräs noun

( -es )

Etymology: Arabic ra's literally, head

1. : cape , headland

2. : an Ethiopian prince or feudal overlord ; also : the ruler of an Ethiopian province

3. : a local Italian Fascist boss originally acting as a despot in his area

II. ˈrəs, ˈräs noun

also ra·sa -sə

( plural rasas )

Etymology: native name in India

: a Manipuri dance drama enacting the legend of the deity Krishna and his consort Radha

III. ˈras noun

( -es )

Usage: often attributive

Etymology: probably from ra (I)t + s arcoma; from the initial isolation of such genes in rat sarcomas

: 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

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.