A lot vs. Alot: 9 Grammatical Pitfalls
1937, from mammo- + -graphy.
mammography mam·mog·ra·phy (mā-mŏg'rə-fē)n. Radiographic examination of the breasts for diagnostic purposes.
Examination of the breasts using x-rays. Mammography is useful in locating tumors of the breast that are too small to be detected by other means.