'Malacology' definitions:

Definition of 'malacology'

(from WordNet)
noun
The branch of zoology that studies the structure and behavior of mollusks

Definition of 'Malacology'

From: GCIDE
  • Malacology \Mal`a*col"o*gy\, n. [Gr. malako`s soft + -logy: cf. F. malacologie.] The science which relates to the structure and habits of mollusks. [1913 Webster]