xenon....but it's an element. If you're considering the periodic table, xenon, if you're just looking for a scientific word with x in it, then I'm not too sure.
Bldogdancr:
How about X-Ray it is used in medical science.
x-ray
No there is not
x chromosone and y chromosone
xenon
xlyem
X-ray, xenon, xylem, xerophyte.
Length X Height
Xenon is a chemical element.
Cerium is a science word. It is a chemical element with the symbol Ce and atomic number 58.
xylem? xylem?
x-ray
There are no states in the world that start with the letter X.