Semasiology \Se*ma`si*ol"o*gy\, n. [Gr. shmasi`a signification + -logy.] (Philol.) The science of meanings or sense development (of words); the explanation of the development and changes of the meanings of words; -- more commonly referred to as {semantics}. -- {Se*ma`si*o*log"ic*al}, a. [Webster 1913 Suppl.]