| ACA | alternative names for the family comprising the New Zealand wrens |
|---|---|
| ACA | phylum or class of elongated wormlike parasites that live in the intestines of vertebrates: spiny-headed worms |
| ACA | any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines |
| ACA | mostly trailing cacti having nocturnal white flowers |
| ACA | cactus of the southwestern United States and northern Mexico having edible juicy fruit |
| ACA | cactus of the southwestern United States and northern Mexico having edible juicy fruit |
| ACA | wahoos |
| ACA | large fast-moving predacious food and game fish |
| ACA | an abnormal red blood cell that has thorny projections of protoplasm |
| ACA | the presence of acanthocytes in the blood stream (as in abetalipoproteinemia) |
| ACA | shaped like a spine or thorn |
| ACA | a breakdown of a cell layer in the epidermis (as in pemphigus) |