conchologyPronunciation: /kɒŋˈkɒlədʒi/Definition of conchology noun [mass noun] the scientific study or collection of mollusc shells. Derivatives conchologicalPronunciation: /-kəˈlɒdʒɪk(ə)l/ adjective conchologist noun Origin: late 18th century: from Greek konkhē 'shell' + -logyconchology in other Oxford dictionaries Definition of conchology in the US English dictionary