| Subject | English | Czech |
| astr. | absolute magnitude of a meteor | absolutní velikost meteoru |
| astr. | absolute magnitude of a planet | absolutní velikost planety |
| astr. | apparent magnitude of a meteor | zdánlivá velikost meteoru |
| astr. | magnitude of the eclipse | velikost zatmění |
| astr. | order of magnitude | řád |
| comp., MS | rough order-of-magnitude estimate | hrubý odhad (An estimate done without detailed costing, or based on initial or incomplete data. It estimates the general size and scope of a project) |