|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
Lederberg Led·er·berg (lěd'ər-bûrg', lā'dər-), Joshua. Born 1925.
American geneticist. He shared a 1958 Nobel Prize for work with genetic mechanisms.
|Lederberg (lěd'ər-bûrg', lā'dər-) Pronunciation Key
American geneticist who made important discoveries concerning the organization of the genetic material of bacteria and developed techniques for the manipulation and combination of genes. For this work he shared with American biochemists George Beadle and Edward Tatum the 1958 Nobel Prize for physiology or medicine.