|Delbrück (děl'brk') Pronunciation Key
German-born American biologist who was a pioneer in the study of molecular genetics. He discovered in 1946 that viruses can exchange genetic material to create new types of viruses. He shared a 1969 Nobel Prize for his work in viral genetics.
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a chattering or flighty, light-headed person.|
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