There are multiple definitions:

1. auropalpebral reflex(English)

   • a form of the wink reflex in which there is a contraction, sometimes very slight, of the orbicularis palpebrarum muscle to an intense sound
   • Audiology
   • https://www.ncb…v/medgen/623768

2. acute-phase response/reactant(English)

   • prominent systemic reaction of the organism to local or systemic disturbances in its homeostasis caused by infection, tissue injury, trauma or surgery, neoplastic growth or immunological disorders
   • Hsp, Hp, ECM, MT, APP
   • Pathology, Infection
   • https://doi.org…jzus.2005.B1045

3. American Pet Registry(English)

   • founded in 1992 with the commitment to providing prompt, courteous, and economical service to pet owners while maintaining integrity in the documentation of pedigrees and the registration of purebred dogs. The registration certificate is proof of ownership
   • Animal welfare, Veterinary medicine
   • https://aprpets.org/

4. abdominoperineal resection(English)

   • involves the excision of the rectum with a total mesorectal excision (TME), and excision of the anus with an adequate circumferential resection margin (CRM)
   • AR, TME, CRM
   • Gastroenterology, Surgery, Robotics
   • https://websurg…doi/vd01en5383/

5. all-patient refined(English)

   • refers to diagnosis-related group severity
   • ACA, DRG, LOS, THA, TJA, TKA
   • Hospital admission, Economics and health care
   • https://doi.org…1999-017-5244-6

6. automatic postural response(English)

   • are highly stereotyped patterns of electromyographic activity in various muscles, triggered in response to sudden disturbances of balance
   • EMG
   • Musculoskeletal system
   • https://doi.org…2-14-05803.2002