- X -

The following are commonly used abbreviations, acronyms, and a glossary of specialized terms starting with the letter:  

— X —

xenolith (abbreviation: Xen).

xenon — chemical element — (abbreviation: Xe).

xylenes, total – chemical compound – (synonyms: dimethyl benzene, xylol, methytoluene, violet 3) – organic chemical – (MCL = 10  mg/L).

xylenes (o, m, p isomers) – chemical compound – see NIOSH

xylidine – chemical compound – see NIOSH