The Collaborative International Dictionary of English v.0.48:

Semeiotics \Se`mei*ot"ics\ (s[=e]`m[-i]*[o^]t"[i^]ks), or
Semiotics \Se`mi*ot"ics\, n.
   1. The study of signs as an element of communication; the
      analysis of systems of communication; -- also called
      semiology.
      [PJC]

   2. a theory of signs and symbols, including as branches
      semantics, pragmatics and syntactics. --[RHUD]
      [PJC]