Limacology (from Latin Latin: [[wikt:en:limax#Latin|limax]], "slug", and Greek Greek, Ancient (to 1453);: -λογία, -logia) is the branch of zoology which deals with slugs, i.e. shell-less gastropod mollusks. A person that studies limacology is referred to as a limacologist.
However, slugs are an extremely polyphyletic group, thus "limacology" is not a taxonomically accurate term, and it is now rarely used.