WordReference Random House Unabridged Dictionary of American English © 2026
no•sol•o•gy
(nō sol′ə jē),USA pronunciation n.
nos•o•log•i•cal
(nos′ə loj′i kəl),USA pronunciation adj.
nos′o•log′i•cal•ly, adv.
no•sol′o•gist, n.
- the systematic classification of diseases.
- the knowledge of a disease.
- Neo-Latin nosologia. See noso-, -logy
- 1715–25;
no•sol′o•gist, n.