| nitro- or (before a vowel) nitr- | |
| —combining form | |
| 1. | indicating that a chemical compound contains a nitro group, -NO2: nitrobenzene |
| 2. | indicating that a chemical compound is a nitrate ester: nitrocellulose |
| [from Greek nitron | |
| nitr- or (before a vowel) nitr- | |
| —combining form | |
| [from Greek nitron | |