Amphigean :: Amphigean (a.) Extending over all the zones, from the tropics to the polar zones inclusive..
Amphigen :: Amphigen (n.) An element that in combination produces amphid salt; -- applied by Berzelius to oxygen, sulphur, selenium, and tellurium..
Amphigenous :: Amphigenous (a.) Increasing in size by growth on all sides, as the lichens..