Pronunciation: (bôl'tu-môr", -mōr"),[key] —n. a black nymphalid butterfly, Melitaea phaeton, characterized by orange-red, yellow, and white markings, common in those areas of the northeastern U.S. where turtlehead, the food plant of its larvae, is found.
Pronunciation: (bôl'tu-môr", -mōr"),[key] —n. 1. David, born 1938, U.S. microbiologist: Nobel prize for medicine 1975.
2. Lord. See Calvert, Sir George. 3. a seaport in N Maryland, on an estuary near the Chesapeake Bay. 786,775.