n.[C]

1. 化石
   go fossil hunting

   搜寻化石去

2. 顽固不化的人；守旧的事物
   She is an old fossil.

   她是个老顽固。

a.[B]

1. 化石的，成化石的
2. 守旧的，陈腐的

n.

1. the remains or impression of a prehistoric plant or animal embedded in rock and preserved in petrified form.
2. humorous an antiquated person or thing.
3. a word or phrase that has become obsolete except in set phrases or forms, e.g. hue in hue and cry.