relict \'re likt\ or \'rel ikt\, noun.
2. (ecology) a. a persistent remnant of an otherwise extinct flora or fauna or kind of organism.
b. something that has survived
3. (geology) a. a relief feature or rock remaining after other parts have disappeared.
b. something left unchanged
Etymology: in sense 1, Middle English relicte, from Medieval latin relicta, feminine past participle of relinquere, to leave behind;
in senses 2 and 3, from Latin relict, residual, from Latin relictus, left behind.
relic (remains, souvenir, memento),
derelict (abandoned, run-down, vagrant, negligent),
and relinquish (leave behind, give up, yield)
all have similar word origins