- a combining form meaning “tumor,” “mass,” used in the formation of compound words: oncogenic.
combining form
- denoting a tumouroncology
word-forming element meaning “bulk, mass,” especially in medical use, “tumor,” from Latinized form of Greek onko-, comb. form of onkos “bulk, size, mass, body.” pref.
- Tumor:oncology.
- Mass; swelling:oncolysis.