what is the plural of......
crises, phenomenon, formula, die, equipment, radius, specimen
The plural forms of the given words are:
| SINGULAR FORM | PLURAL FORM |
| Crisis | Crises |
| Phenomenon | Phenomena |
| Formula | Formulae |
| Die | Dies |
| Equipment | Equipment (Collective noun) |
| Radius | Radii |
| Specimen | Specimens |