"Protoxide" validity in different word game dictionaries
| Dictionary | Validity |
|---|---|
| Scrabble US(US/Canada/Thailand - TWL/NWL) | Yes |
| Scrabble UK(International - SOWPODS/CSW) | Yes |
| Words with Friends(WWF) | No |
"protoxide" Definition
- the one of a series of oxides exclusive of suboxides that has the lowest proportion of oxygen