| X | being severn more than thirty |
|---|---|
| X | being eight more than thirty |
| X | (genetics) abnormal complement of sex hormones in a male resulting in Klinefelter's syndrome |
| X | syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation |
| X | (genetics) normal complement of sex hormones in a male |
| X | type genus of Xylariaceae |
| X | fungus causing black root rot in apples |
| X | the fruiting bodies of the fungi of the genus Xylaria |
| X | family of fungi characterized by dark brown to back spores |
| X | the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels |
| X | a colorless flammable volatile liquid hydrocarbon used as a solvent |
| X | a local anesthetic (trade names Lidocaine and Xylocaine) used topically on the skin and mucous membranes |