| HCAT | Human Cationic Amino Acid Transporter | 人阳离子氨基酸转运蛋白 |
| HCAT | Hastings College of Arts & Technology (UK) | 黑斯廷斯学院的艺术和技术(英国) |
| HCAT | human cell agglutination test | 人细胞凝集试验 |
| HCAT | Hard Chrome Alternatives Team | 硬铬替代品团队 |
| HCAT | Headquarters Contingency Action Team (NASA) | 总部应急行动小组（NASA） |