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a combining form meaning “tumor,” “mass,” used in the formation of compound words:
combining form
denoting a tumour: oncology

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.”

onco- pref.


Read Also:

  • Oncocyte

    oncocyte on·co·cyte (ŏng’kə-sīt’) n. A large granular acidophilic tumor cell having numerous mitochondria.

  • Oncocytic hepatocellular tumor

    oncocytic hepatocellular tumor on·co·cyt·ic hepatocellular tumor (ŏng’kə-sĭt’ĭk) n. A tumor in which malignant hepatocytes are intersected by fibrous lamellated bands.

  • Oncocytoma

    oncocytoma on·co·cy·to·ma (ŏng’kō-sī-tō’mə) n. pl. on·co·cy·to·mas or on·co·cy·to·mata (-mə-tə) A glandular tumor that is chiefly composed of oncocytes, occurring most often in the salivary glands.

  • Oncofetal

    oncofetal on·co·fe·tal (ŏng’kō-fēt’l) adj. Of or relating to substances associated with tumor formation and present in fetal tissue.

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