Lexical semantics is a field in Computer science and Linguistics which deals manly with word meaning. It covers various theories of the structure of words, the differences and similarities in lexical semantic structure between different languages, and the relationship of word meaning to sentence meaning and syntax.
... there exists a third, extra-long length for most vowels, which is used in various cases, but particularly when recording a shout, or a greeting.)
Vowels (with approximate ...