Micrometeoroid Definition
 mīkrō-mētē-ə-roid 
    noun
  
 An extremely small meteoroid.
 Webster's New World 
(astronomy, geology) An extraterrestrial particle less than a millimeter in size.
Wiktionary 
Synonyms: 
  - micrometeor
 - micrometeorite
 
Other Word Forms of Micrometeoroid
Noun
Singular:
 micrometeoroidPlural:
 micrometeoroidsOrigin of Micrometeoroid
-  
micro- +"Ž meteoroid (micro- +"Ž meteor +"Ž -oid)
From Wiktionary
 
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