Ejecta is a noun that refers to something that is thrown out. 

The Latin word ejectus (ee JEK toose) means ‘thrown out.’ Our word of the day is derived from ejectus and has landed in English in the late 19th century. Here’s an example of ejecta in use:

Eddie tends to make a mess when he goes canoeing. All that ejecta from his canoe winds up polluting the lake with beer cans, food wrappers and other nasty stuff he tosses in the water.