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David ("Davy") 1786–1836, U.S. frontiersman, politician, and folklore hero.
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World English Dictionary
Crockett (ˈkrɒkɪt)
David, known as Davy Crockett. 1786--1836, US frontiersman, politician, and soldier

Davy (ˈdeɪvɪ)
See Davy lamp Sir Humphry. 1778--1829, English chemist who isolated sodium, magnesium, chlorine, and other elements and suggested the electrical nature of chemical combination. He invented the Davy lamp

Collins English Dictionary - Complete & Unabridged 10th Edition
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Science Dictionary
Davy   (dā'vē)  Pronunciation Key 
British chemist who was a pioneer of electrochemistry. By means of electrolysis Davy isolated several elements, including sodium and potassium (1807), and barium, boron, calcium, and magnesium (1808). He also proved that diamonds are a form of carbon.
The American Heritage® Science Dictionary
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