Semeiology

Semeiology Se`mei*ol"o*gy (s[=e]`m[-e]*[o^]l"[-o]*j[y^] or s[=e]`m[-i]*[o^]l"[-o]*j[y^]), or Semiology Se`mi*ol"o*gy (s[e^]m`[-e]*[o^]l"[-o]*j[y^]), n. [Gr. shmei^on a mark, a sign + -logy.] The study of signs as an element of communication; the analysis of systems of communication; -- also called {semiotics}. Specifically: (a) (Med.) The science of the signs or symptoms of disease; symptomatology. (b) The art of using signs in signaling. [1913 Webster]