The Collaborative International Dictionary
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:
(Med.) The science of the signs or symptoms of disease; symptomatology.
The art of using signs in signaling.
Wiktionary
semeiology
n. (alternative form of semiology English)