| X. muta (1) | Xanthin Oxidase (2) | Xanthine Oxidase (3) |
| Xanthine Oxidase Enzyme (1) | Xanthine oxidase inhibitory (1) | Xanthine Oxidase. (1) |
| Xanthone (3) | Xanthone Garcinia mangostana (1) | Xenobiotics (1) |
| Xetospongia exigua (1) | XGTQ herbal extract (1) | Ximenia americana (1) |
| XN-1000 (1) | Xpert® MTB/RIF Ultra (1) | XRD (1) |
| XTT assay (1) | Xylariaceae (1) | Xylene (1) |
| xylopic acid (2) | Xyris indica (1) | |