Source : Webster's Revised Unabridged Dictionary (1913)

Chamber \Cham"ber\, v. i. [imp. & p. p. {Chambered}; p. pr. &
   vb. n. {Chambering}.]
   1. To reside in or occupy a chamber or chambers.

   2. To be lascivious. [Obs.]

Chambered \Cham"bered\, a.
   Having a chamber or chambers; as, a chambered shell; a
   chambered gun.

Source : WordNet®

chambered
     adj : having compartmental chambers; "a spiral chambered seashell"