composés chimiques
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Oripeau | Substance | 1 | 8.9 |
| Oritavancine | Concept | 16 | 1.0 |
| Oritine | Concept | 3 | 0.0 |
| Orlistat | Concept | 34 | 40.2 |
| Orloff | Minéral | 26 | 7.6 |
| Ornipressine | Concept | 11 | 0.2 |
| Orogenèse | Concept | 59 | 66.2 |
| Orogenèse Acadienne | Concept | 14 | 1.3 |
| Orogenèse Alléghanienne | Concept | 11 | 2.5 |
| Orogenèse Alpine | Concept | 45 | 25.0 |
| Orogenèse Andine | Concept | 9 | 0.1 |
| Orogenèse Brésilienne | Concept | 8 | 1.5 |
| Orogenèse Calédonienne | Concept | 40 | 14.3 |
| Orogenèse Grenvillienne | Concept | 12 | 2.9 |
| Orogenèse Laramienne | Concept | 17 | 3.0 |
| Orogenèse Panafricaine | Concept | 16 | 7.3 |
| Orogenèse Pénokéenne | Concept | 3 | 0.0 |
| Orogenèse Taconienne | Concept | 12 | 1.7 |
| Orogenèse Trans-hudsonienne | Concept | 7 | 0.0 |
| Orotidine | Concept | 9 | 0.0 |
| Orotidine Monophosphate | Concept | 13 | 0.4 |
| Oroxindine | Concept | 8 | 0.0 |
| Oroxyline A | Concept | 10 | 0.3 |
| Orphénadrine | Concept | 19 | 0.3 |
| Orpiment | Substance | 1 | 5.0 |
| Orsanine | Concept | 1 | 0.8 |
| Orseille | Substance | 4 | 9.4 |
| Ortho-nitrophényl-β-galactoside | Concept | 8 | 0.0 |
| Ortho-vanillin | Concept | 11 | 0.0 |
| Orthoacétate de Triéthyle | Concept | 10 | 0.3 |
| Orthocarborane | Concept | 3 | 0.2 |
| Orthoformiate D'éthyle | Concept | 20 | 2.7 |
| Orthoformiate de Triméthyle | Concept | 16 | 1.7 |
| Orthomolybdate D'ammonium | Concept | 13 | 1.0 |
| Orthophosphate de Fer | Concept | 21 | 0.0 |
| Orthophénylphénate de Sodium | Concept | 12 | 0.5 |
| Orthosilicate de Lithium | Concept | 5 | 0.0 |
| Orthosilicate de Magnésium | Concept | 8 | 0.2 |
| Orthosilicate de Sodium | Concept | 7 | 0.1 |
| Orthosilicate de Tétraméthyle | Concept | 12 | 2.4 |
| Orthostate | Substance | 17 | 7.7 |
| Oryzalin | Concept | 9 | 0.7 |
| Ose | Concept | 73 | 146.9 |
| Oseltamivir | Concept | 48 | 48.3 |
| Osilodrostat | Concept | 8 | 0.0 |
| Osimertinib | Concept | 19 | 5.2 |
| Osladine | Concept | 13 | 0.5 |
| Osmocène | Concept | 14 | 0.1 |
| Osmose | Concept | 83 | 322.1 |
| Ostéine | Composé Chimique | 7 | 4.6 |