|a chattering or flighty, light-headed person.| |a screen or mat
covered with a dark material for shielding a camera lens from
excess light or glare.| |1.||David. born 1938, US molecular
biologist: shared the Nobel prize for physiology or medicine
(1975) for his discovery of reverse transcriptase| |2.||See
Calvert Lord.| Baltimore Bal·ti·more (bôl'tə-môr'), David. Born
1938. American microbiologist. He shared a 1975 Nobel Prize for
research on the interaction of tumor viruses and genetic
material. |Baltimore (bôl'tə-môr') Pronunciation Key American
microbiologist who discovered the enzyme reverse transcriptase,
which is capable of passing information from RNA to DNA. Prior
to this discovery, it was assumed that information could flow
only from DNA to RNA. He won a 1975 Nobel Prize for his research
into the connection between viruses and cancer. Largest city in
Maryland. Note: Named after Lord Baltimore, founder of the
colony of Maryland. The city is a major industrial center and
port.