1.  relict(n = noun.plant) - 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;
is a kind of being, organism

2.  relict(n = noun.object) - geological feature that is a remnant of a pre-existing formation after other parts have disappeared;
is a kind of formation, geological formation

   A woman whose husband is dead; a widow. [1913 Webster]
"Eli dying without issue, Jacob was obliged by law to marry his relict, and so to raise up seed to his brother Eli." [1913 Webster]

relict, n.
1 a a geological or other object surviving in its primitive form. b an animal or plant known to have existed in the same form in previous geological ages.
2 (foll. by of) archaic a widow.

Etymology:
L relinquere relict- leave behind (as RE-, linquere leave): sense 2 f. OF relicte f. L relicta

N  divorce, divorcement, separation, judicial separation, separate maintenance, separatio a mensa et thoro, separatio a vinculo matrimonii, trial separation, breakup, annulment, widowhood, viduity, weeds, widow, widower, relict, dowager, divorcee, cuckold, grass widow, grass widower, merry widow.