The Collaborative International Dictionary of English v.0.48:

Paijama \Pai*ja"ma\, n.
   Pyjama.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pyjama \Py*ja"ma\, n. [Hind. p[=a]e-j[=a]ma, literally, leg
   clothing.]
   In India and Persia, thin loose trowsers or drawers; in
   Europe and America, drawers worn at night, or a kind of
   nightdress with legs. Usually used in the plural. See
   pajamas. [Written also paijama pajama.] [Chiefly
   British variant of pajama.]
   [1913 Webster +PJC] Pyjamas