| MHN | massive hepatic necrosis; Mohs hardness number; morbus hemolyticus neonatorum |
|---|---|
| REEDS | retention of tears, ectrodactyly, ectodermal dysplasia, and strange hair, skin and teeth [syndrome] |
| RHN | Rockwell hardness number |
| VHN | Vickers hardness number |
| WT | wall thickness; water temperature; wavelet transform; wild type [strain]; Wilms tumor; wisdom teeth;... |