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Dictionary · Word part

mamm/o

A word root that means breast; mast/o means the same.

MAM-oh root

What it means

The root in words about the breast. A mammogram is an x-ray of the breast and mammary glands are the milk-making glands. Its Greek twin, mast/o, gives mastitis (inflammation of the breast, common in breastfeeding) and mastectomy (removal of the breast).

At a glance

Also writtenmammo-

Related terms

-itis

A word ending that means inflammation.

screening

Testing people who have no symptoms to find a disease or risk early.

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