tinneus Save DMLBS tinneus [ME tin+-eus], a that is made of tin. b (as sb. n.) kind of silvery malleable metal obtainable from cassiterite, tin. a 1549 unam boxam tineam sancti olei Pat 816 m. 18. b 1486 tam tinnei, plumbi, et cupri quam et auri et argenti Pat 562 m. 25.