From Middle English seldsene (“rarely encountered, seldom seen; rare; as adv. seldom, rarely”) also seld-sēn, seldscene, seltsene, Old English seldsīne (“rare, extraordinary, unfamiliar, uncommon”) also seldsiene.
seldseen (not comparable)
- seldom seen, rare, uncommon
- And seldseen costly stones of so great price — Marlowe, The Jew of Malta
- ... and awakening, saw a serpent like a dragon, a seldseen sight, — The Arabian Nights