The Collaborative International Dictionary of English v.0.48:

CD-WO \CD-WO\ n. [from Compact Disk-Write Once.]
   A recordable compact disk; a compact disc on which you can
   write only once and thereafter is read-only.

   Syn: CD-R, compact disc recordable, compact disc write-once.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

CD-WO
    n 1: a compact disc on which you can write only once and
         thereafter is read-only memory [syn: CD-R, compact disc
         recordable, CD-WO, compact disc write-once]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CDWO
       Compact Disk - Write Once (CD), "CD-WO"