fossil
noun [ C ] uk/ˈfɒs.əl/ us/ˈfɑː.səl/
(IN ROCK)
化石
the shape of a bone, a shell, or a plant or animal that has been preserved in rock for a very long period
(PERSON)
informal humorous老人;（尤指）老顽固，思想僵化的人，老古董
an old person, especially one who will not accept new ideas