micrometeoroid

noun mi·cro·me·te·or·oid \ -ˈmē-tē-ə-ˌrȯid \

Definition of micrometeoroid

: micrometeorite 2

Recent Examples of micrometeoroid from the Web

Currently, very little data exists that describe what effect temperature extremes, lunar dust, micrometeoroids, solar radiation, etc.

— joe pappalardo, Popular Mechanics, "The U.S. Doesn't Want Anyone Messing With the Apollo Landing Sites," 23 Mar. 2018
What works in Webb's favor is the micro part of micrometeoroid: even at high speed, the particles don't have the mass to do catastrophic damage.

— jeffrey kluger, Time, "Eyes In the Sky," 22 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'micrometeoroid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.