Scrabble?! RELICT

Definitions of RELICT in various dictionaries:

noun - an organism or species surviving as a remnant of an otherwise extinct flora or fauna in an environment much changed from that in which it originated

noun - geological feature that is a remnant of a pre-existing formation after other parts have disappeared

An organism or a species of an earlier time surviving in an environment that has undergone considerable change.

Something that has survived; a remnant.

Of or relating to something that has survived, as structures or minerals after destructive processes.

noun - an organism surviving in a changed environment