archaic

(s) so extremely old as seeming to belong to an earlier period
- a ramshackle antediluvian tenement
- antediluvian ideas
- archaic laws
antiquated, antediluvian,
(s) little evolved from or characteristic of an earlier ancestral type
- archaic forms of life
- primitive mammals
- the okapi is a short-necked primitive cousin of the giraffe
primitive,

antiquated antediluvian primitive

archaicism