parahydrogen (ˌpærəˈhaɪdrədʒən) ![]() | |
| —n | |
| chem Compare orthohydrogen the form of molecular hydrogen (constituting about 25 per cent of the total at normal temperatures) in which the nuclei of the two atoms in each molecule spin in opposite directions | |
| a gadget; dingus; thingumbob. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |