The Collaborative International Dictionary of English v.0.48:

Seld \Seld\ (s[e^]ld), a. [See Seldom.]
   Rare; uncommon; unusual. [Obs.] --Chaucer. Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Seld \Seld\, adv.
   Rarely; seldom. [Obs.] --Chaucer.
   [1913 Webster]