| Subject | English | Latvian |
| econ. | apparatus based on the use of rays | aparatūra, kurā izmanto starojumu |
| comp., MS | Blu-ray Disc | Blu-ray disks (A high definition optical disc format which uses a smaller focus blue-violet 405 nm laser allowing higher precision and storage density. A competitor to HD DVD) |
| life.sc., fish.farm. | cuckoo ray | dzegužraja (Leucoraja naevus, Raja naevus, Leucoraja naevus, Raja naevus) |
| earth.sc., life.sc. | gamma-rays | gamma starojums |
| earth.sc., life.sc. | gamma rays | gamma starojums |
| life.sc., fish.farm. | marbled electric ray | elektriskā raja (Torpedo marmorata) |
| fish.farm. | Ray's bream | jūras plaudis (Brama brama, Brama raii, Brama raji, Brama brama, Brama raii, Brama raji) |
| life.sc., fish.farm. | skates and rays | raju dzimtas zivis (Rajidae) |