French explorer who circumnavigated the globe accompanied by scientists (1729-1811) n
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one gray equals 100 rad n English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965) n English poet best known for his elegy written in a country churchyard (1716-1771) n American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806) n United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888) v make grey v turn grey
