n :  a complex naturally occurring derivative of apatite that is closely related to the inorganic constituents of bones, dental enamel, and dentin
 
Dahll, Tellef (1825-1893), Norwegian mineralogist and geologist. Dahll was employed as a geologist by private mining concerns and for a time was a surveyor of mines. He also helped to edit geological maps of Norway and other parts of northern Scandinavia. In 1888, the mineral dahllite was named after him and his brother Johann, also a mineralogist.
 
 
 
Similar sounding terms:  de·lead  delt   delta  de·lude 
 
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