Definition of lexicology in US English:

lexicology

noun

  • The study of the form, meaning, and use of words.

    • ‘Living dialects were seen to furnish a huge treasury of living data on phonology, lexicology, and other features of language that written texts could not furnish.’

Pronunciation

lexicology

/ˌleksəˈkäləjē//ˌlɛksəˈkɑlədʒi/