Tuberculosis
mid 19th century: modern Latin, from Latin tuberculum (see tubercle) + -osis.
wiktionary
To international scientific vocabulary from New Latin, from Latin tūberculum (diminutive of tūber(“lump”)) + -osis(“diseased condition”); named for the encapsulated colonies of Mycobacterium tuberculosis within the lungs in pulmonary tuberculosis, which can look like small tubers ( tubercles) on gross pathology. The disease has existed throughout human experience and had other names for millennia before scientific medicine renamed it with a New Latin term in the mid-19th century (1840s); in English it was called consumption because of the wasting away that consumed health and seemed even to consume flesh in some cases (for example, causing fistulas and tissue breakdown).
etymonline
tuberculosis (n.)
1860, "disease characterized by tubercules," a medical Latin hybrid, from Latin tuberculum "small swelling, pimple," diminutive of tuber "lump" (from PIE root *teue- "to swell") + -osis, a suffix of Greek origin. So called in reference to the tubercules which form in the lungs. Originally in reference to any disease characterized by tubercules; since the discovery in 1882 of the tubercule bacillus by German bacteriologist Robert Koch (1843-1910) restricted to disease caused by this. Abbreviation T.B. attested from 1912.
