Acei

Acei or variation, may refer to:


 * ACE inhibitor (ACEI) Angiotensin-converting-enzyme inhibitors
 * Pseudotropheus sp. "acei" (fish), the acei, a cichlid
 * Association for Childhood Education International
 * Canadian Internet Registration Authority (ACEI; Autorité canadienne pour les enregistrements Internet), a bilingual authority in bilingual Canada
 * Automobile Central Enterprise, Inc., a subsidiary of Philippine company AC Industrials