A lot vs. Alot: 9 Grammatical Pitfalls
oncogene on·co·gene (ŏng'kə-jēn)
A gene that causes the transformation of normal cells into cancerous tumor cells, especially a viral gene that transforms a host cell into a tumor cell.
A gene that causes normal cells to become cancerous either because the gene is mutated or because the gene is expressed at the wrong time in development. See Note at cancer.