composés chimiques
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Yohimbine | Concept | 28 | 29.5 |
| Ynolate | Composé Chimique | 8 | 0.3 |
| Ylangène | Composé Chimique | 1 | 0.0 |
| Yessotoxine | Concept | 9 | 0.3 |
| Yersiniabactine | Composé Chimique | 9 | 0.2 |
| Yersinia Cin | Composé Chimique | 1 | 0.2 |
| Yellowcake | Concept | 31 | 24.5 |
| Yct529 | Concept | 7 | 0.0 |
| Yata No Kagami | Substance | 18 | 6.5 |
| Yarn Bombing | Substance | 17 | 5.5 |
| Xénon 135 | Concept | 12 | 3.4 |
| Xénon 133 | Concept | 6 | 1.1 |
| Xénocristal | Substance | 2 | 0.1 |
| Xénobiotique | Concept | 33 | 37.4 |
| Xénate | Composé Chimique | 2 | 0.2 |
| Xylène | Composé Chimique | 50 | 114.7 |
| Xylulose-5-phosphate | Concept | 15 | 0.8 |
| Xylulose | Concept | 27 | 4.3 |
| Xylometazoline | Concept | 31 | 15.7 |
| Xyloglucane | Composé Chimique | 10 | 4.3 |
| Xylitol | Concept | 47 | 92.8 |
| Xylidine | Composé Chimique | 6 | 3.1 |
| Xylazine | Concept | 28 | 44.8 |
| Xs Pour Elle | Concept | 1 | 2.6 |
| Xist | Composé Chimique | 7 | 2.9 |
| Ximélagatran | Concept | 10 | 0.8 |
| Xantphos | Concept | 10 | 0.0 |
| Xanthène | Concept | 20 | 2.2 |
| Xanthotoxine | Concept | 11 | 12.9 |
| Xanthosine Triphosphate | Concept | 12 | 0.6 |
| Xanthosine Monophosphate | Concept | 16 | 0.9 |
| Xanthosine | Concept | 15 | 0.7 |
| Xanthoptérine | Concept | 12 | 1.1 |
| Xanthophylle | Substance | 41 | 20.7 |
| Xanthone | Concept | 22 | 4.8 |
| Xanthohumol | Concept | 13 | 0.4 |
| Xanthine | Concept | 43 | 17.8 |
| Xanthate | Composé Chimique | 20 | 2.5 |
| Xanoméline/chlorure de Trospium | Médicament | 6 | 0.0 |
| Xamotérol | Concept | 9 | 0.0 |
| X-gal | Concept | 16 | 10.0 |
| Wyosine | Concept | 3 | 0.5 |
| Wybutosine | Concept | 8 | 0.5 |
| Wogonine | Concept | 11 | 0.6 |
| Wittelsbach-graff | Minéral | 11 | 4.1 |
| Wightéone | Concept | 9 | 0.2 |
| Wicking Bed | Substance | 4 | 0.2 |
| Whiteface (performance) | Concept | 3 | 1.4 |
| White Spirit | Concept | 25 | 65.9 |
| Western Canadian Select | Substance | 2 | 1.3 |