WordReference Random House Unabridged Dictionary of American English © 2026
pro•tis•tol•o•gy
(prō′ti stol′ə jē),USA pronunciation n.
pro•tis•to•log•i•cal
(prō tis′tl oj′i kəl),USA pronunciation adj.
pro′tis•tol′o•gist, n.
- Biologythe biology of the Protista.
- 1910–15; protist + -o- + -logy