| HAEC | Heure AvancÉe d'Europe Centrale (French: Central European Summer Time) | Heure AvancÉe d'Europe Centrale (French: Central European Summer Time) |
| HAEC | Hockerill Anglo European College (Hertfordshire, UK) | 霍克希尔英欧学院（英国赫特福德郡） |
| HAEC | Human Aortic Endothelial Cell | 人主动脉内皮细胞 |
| HAEC | Human Artificial Episomal Chromosome | 人类人工染色体 |
| HAEC | Human Arterial Endothelial Cell | 人动脉内皮细胞 |