Ejected matter, as that from an erupting volcano.(noun-plural)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "ejecta" in a sentence
"Although researchers call the ejecta ash, it really isn't the type of burned material that most people associate with the word."
"The force of the impact of the object against the gas planet caused debris and what scientists call ejecta to shoot away in all directions from the point of impact."
"We were basically able to basically locate multiple mortar locations that corresponded with the locations of the craters and the pattern of the ejecta material ejected from the craters."