The Collaborative International Dictionary of English v.0.48:

Protozoic \Pro`to*zo"ic\, a.
   1. (Zool.) Of or pertaining to the Protozoa.
      [1913 Webster]

   2. (Geol.) Containing remains of the earliest discovered life
      of the globe, which included mollusks, radiates and
      protozoans.
      [1913 Webster]

WordNet (r) 3.0 (2006):

protozoic
    adj 1: of or relating to the Protozoa [syn: protozoal,
           protozoan, protozoic]