in earlier times, a person who explored by ship | United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888) |
the member of an aircrew who is responsible for the aircraft's course | American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806) |
the ship's officer in charge of navigation | English poet best known for his elegy written in a country churchyard (1716-1771) |
| English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965) |