- xylenol
- x ray crystallography
- xeroclesistogamy
- xerarch
- xenodiagnosis
- xenopsylla cheopis
- xenopsylla braziliensis
- xanthochroi
- xanthoprotein
- xanthoproteic test
- xenocarpy
- xenogenic graft
- x_chromosome
- xanthium mecrocarpum
- xanthium strumarium
- xanthium leaf
- xanthine oxidase
- xenopsylla astia
- xzero address instruction