disquisition – A diligent or systematic search, a thorough investigation or research. More…
primary source – A direct source of information or research, a document not emended by a third party. More…
secondary source – Information or research that is derivative, such as a comment by a historian, an encyclopedia article, or a critical essay. More…
Rh factor – Named for the rhesus monkeys used in research to identify blood types. More…