Relating to or characteristic of actinomycosis, a chronic bacterial infection caused by Actinomyces species that typically affects the jaw, lungs, or abdomen.
From actinomyces (Greek aktin- 'ray' + mykes 'fungus') + -osis (disease condition) + -istic (adjective suffix). Though called a fungus historically, it's actually a bacterium; the name stuck from early misidentification.
Actinomycosis was once called 'lumpy jaw' in cattle because infected animals developed grotesque swellings—yet the cure is as simple as penicillin, discovered decades after the disease became infamous.
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