Definition of osphresiology in US English:

osphresiology

noun

rare, historical
  • Originally; †a treatise on the sense of smell and odours (obsolete). Later: the scientific study of the sense of smell.

Origin

Mid 19th century; earliest use found in Robley Dunglison (1798–1869), physician and medical writer. From French osphrésiologie from ancient Greek ὄσϕρησις smelling, smell + French -ologie.

Pronunciation

osphresiology

/ɒsˌfriːsɪˈɒlədʒi/