In the natural sciences, a primary source could be defined as a report of original findings or ideas. These sources often appear in the form of research articles with sections on methods and results..
crampon - a hinged pair of curved iron bars; used to raise heavy objects crampoon grapnel, grapple, grappling hook, grappling iron, grappler - a tool consisting of several hooks for grasping and holding; often thrown with a rope
tenon - a projection at the end of a piece of wood that is shaped to fit into a mortise and form a mortise joint tongue and groove joint - a mortise joint made by fitting a projection on the edge of one board into a matching groove on another board