| Abbreviation | Definition |
|---|---|
| SEAFDEC | South- East Asian Fisheries Development Center |
| SEAFDEC | South-East Asian Fisheries DEvelopment Center |
| SEAFIS | South- East Asian Fisheries Information System |
| SEAFIS | South-East Asian Fisheries Information System |
| SEAFLOE | Southeast Florida Outfalls Experiment |
| SEAL | Sea Explorer Advanced Leadership |
| SEAMAP | Southeast Area Monitoring and Assessment Program |
| SEARCH | Study of Environmental Arctic Change |
| SEAREX | SEa-AiR EXchanges study |
| SEAREX | Study on Sea- Air Exchanges |
| SEAS | Scuba Explorers And Adventurers Society |
| SEAS | Shipboard Environmental Data Acquisition System |
| SEASAT | Earth Satellite Dedicated to Oceanographic Applications |
| SEAWIFS | Sea-viewing Wide Field-of-view Sensor |
| SEB | Source Evaluation Board |
| SEBSCC | Southeast Bering Sea Carrying Capacity |
| SEC | South Equatorial Current |
| SEC | Space Environment Center |
| SECAN | Science and Engineering Committee on Advisory to NOAA |
| SECAN | Science and Engineering Committee on Advisory to NOAA (National Oceanic and Atmospheric Administration) |