Wye branch (Y branch)
x
X-Band
X-chromosome
X inactivation
X-linked
X-linked disease
X-Ray Background
X-Ray Burst
X-ray crystallography
X-Ray Flare Class
X-Rays
xanthophyll
XBT
XCITED
| XCPT
xenia
xenobiotic
xenogeneic
xenograft
xenotransplantation
Xenotransplantion
Xeriscape
xerophyte
XPC
XSEC
xylem
Y-chromosome
YAC
YDA
|