Xylyl n. : Any one of three metameric radicals which are characteristic respectively of the three xylenes.

Example:


Taxonomy
Xylyl bromide, free encyclopedia, agent, battle of Ypres, search, T-stoff, white cross, its easy, 1914, the French, tear gas grenades, Germans, World War I, active ingredient, T-shell, explosive, liquid, inventor.

Defination from the web:
Xylyl bromide, T-stoff or methylbenzyl bromide, was used as a tear gas in World War I under the name Weisskreuz (white cross) ... Xylyl bromide was the active ingredient in the T-shell, an artillery shell with explosive in ... Gas masks offered good protection against xylyl bromide. ...