There are multiple definitions:

1. ankyloblepharon, ectodermal defects, and clefting(English)

   • rare disorder characterized by a wide variety of symptoms that can affect the skin, hair, nails, teeth, certain glands, and the hands and feet; aka Hay-Wells syndrome
   • Congenital disorders, Ophthalmology, Dermatology, Gland(ular)
   • https://raredis…s/aec-syndrome/

2. absolute eosinophil count(English)

   • Allergy, Hematology
   • https://medline…icle/003649.htm

3. airway epithelial cell(English)

   • ALI, COPD, PARP, bAEC, SAEC, WFSE
   • Respiratory system, Cell biology
   • https://doi.org…2931-018-0945-2

4. asymptomatic exposed control(English)

   • NK2R, OA, SNP, TDI, VEGF
   • https://doi.org…22.2006.02547.x

5. automatic exposure control(English)

   • ALARA, CT, FOM, IR, SNR, TKA
   • Regulation / control, Knee, Surgery
   • https://doi.org…edicina60010098