| Acronym | Definition |
|---|
| LSEC | Legal Secretary (course) |
| LSEC | Laboratory of Scientific and Engineering Computing (est. 1993; Institute of Computational Mathematics and Scientific/Engineering Computing; Chinese Academy of Sciences; Beijing, China) |
| LSEC | State Key Laboratory of Scientific and Engineering Computing (China) |
| LSEC | Liver Sinusoidal Endothelial Cell |
| LSEC | Laboratory for the Study of Emotion and Cognition (Department of Biomedical Engineering; State University of New York at Stony Brook; Stony Brook, NY) |
| LSEC | Life-cycle Support Engineering Center |