The word "resorptive" refers to the process of absorbing or taking in something, such as nutrients or substances, into the body or a specific part of it. Full definition
A Feline Odontoclastic Resorptive Lesion (FORL) is similar to a human cavity - erosion of the tooth at the gumline eventually exposes the pulp cavity and causes pain. (catsexclusive.com)
The lesions are referred to as feline odontoclastic resorptive lesions (FORLs). (michigananimalhospital.com)
Other names for this disease include Feline Oral Resorptive Lesions (FORLs) or Cervical Line Lesion. (earlysvilleanimalhospital.com)