• WordNet 3.6
    • adj atheromatous of or relating to or resembling atheroma "atheromatous degeneration of the arteries"
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Webster's Revised Unabridged Dictionary
    • a Atheromatous (Med) Of, pertaining to, or having the nature of, atheroma.
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Century Dictionary and Cyclopedia
    • atheromatous Pertaining to or resembling atheroma; having the qualities of atheroma.
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In literature:

It contained 40 ounces of atheromatous material.
"Anomalies and Curiosities of Medicine" by George M. Gould
The wall of the aneurism is atheromatous, or calcified; the middle coat may be atrophied.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
This is the so-called atheromatous abscess.
"Arteriosclerosis and Hypertension:" by Louis Marshall Warfield