English word pentachloride comes from English penta- (Five.), English chloride
| Dictionary entry | Language | Definition |
|---|---|---|
| penta- | English (eng) | Five. |
| chloride | English (eng) | (chemistry) any salt of hydrochloric acid, such as sodium chloride, or any binary compound of chlorine and another element or radical. |
| pentachloride | English (eng) | (chemistry) any chloride containing five chlorine atoms in each molecule. |