• (n.) A writer of martyrology; an historian of martyrs.
Mar`tyr·ol'o·gist noun [ Confer French martyrologiste .] A writer of martyrology; an historian of martyrs. T. Warton. 
martyrologist 1. A writer of martyrology. 2. An historian of martyrs. 3. Someone who specializes in the accounts of the lives and manners of the deaths of martyrs. 4. A writer of or a specialist in martyrology.