Jeffersonia :: "Jeffersonia (n.) An American herb with a pretty, white, solitary blossom, and deeply two-cleft leaves (Jeffersonia diphylla); twinleaf..
Jeffersonian :: "Jeffersonian (a.) Pertaining to, or characteristic of, Thomas Jefferson or his policy or political doctrines..
Jeffersonite :: Jeffersonite (n.) A variety of pyroxene of olive-green color passing into brown. It contains zinc.