ejecta

noun

ejec·​ta i-ˈjek-tə How to pronounce ejecta (audio)
plural in form but singular or plural in construction
: material thrown out (as from a volcano)

Examples of ejecta in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Also look for bright 'ejecta rays' — streaks of reflective debris radiating from old impact sites. Anthony Wood, Space.com, 9 May 2025 That ejecta slams into so much of the interstellar medium so hard that sufficient numbers of particles strike each other to make an acoustic wave. Phil Plait, Scientific American, 25 Apr. 2025 Nonetheless, the steady hand of gravity allowed the Earth to reabsorb some of this ejecta, and a sizable portion of the rest formed the moon. Max Bennett, Discover Magazine, 12 Apr. 2025 Previously, geophysicists had argued that these transitions represent the difference between volcanic materials above and ejecta from impacts buried below, and a change from porous rock (i.e. filled with cracks and hollows) to solid rock at 12 miles (20 kilometers) deep. Keith Cooper, Space.com, 17 Mar. 2025 See All Example Sentences for ejecta

Word History

Etymology

New Latin, from Latin, neuter plural of ejectus

First Known Use

1886, in the meaning defined above

Time Traveler
The first known use of ejecta was in 1886

Browse Nearby Words

Cite this Entry

“Ejecta.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ejecta. Accessed 20 May. 2025.

Medical Definition

ejecta

noun
ejec·​ta i-ˈjek-tə How to pronounce ejecta (audio)
: matter (as vomit) ejected from the body
Last Updated: - Updated example sentences
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