| HAP | (genetics |
|---|---|
| HAP | the condition of being haploid |
| HAP | genus of North and South American perennial herbs or shrubs with yellow flowers |
| HAP | dark green erect herb of northwestern United States and southwestern Canada having stiff leaves in dense tufts and yellow flower heads |
| HAP | annual of southern United States and Mexico having bristly leaves and pale yellow flowers |
| HAP | slender perennial of western North America having weakly bristly leaves and yellow flower heads |
| HAP | an order in the subclass Acnidosporidia |
| HAP | parasite in invertebrates and lower vertebrates of no known economic importance |
| HAP | by accident |
| HAP | come to pass |
| HAP | come into being |
| HAP | happen, occur, or be the case in the course of events or by chance |