micrometeorite

enUK

mi·cro·me·te·or·ite

M0274200 (mī′krō-mē′tē-ə-rīt′)n. A tiny particle of meteoric dust, especially one of many that fall to the surface of the earth or moon.

micrometeorite

(ˌmaɪkrəʊˈmiːtɪəˌraɪt) n (Geological Science) a tiny meteorite having a diameter of 10–40 micrometres, found esp in rainwater and seawater, having entered the atmosphere as a micrometeoroid (extremely small meteoroid)

Thesaurus

Noun

micrometeorite - a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmospheremicrometeor, micrometeoroidmeteorite - stony or metallic object that is the remains of a meteoroid that has reached the earth's surface

micrometeorite

enUK

micrometeorite

(mÿ-kroh-mee -tee-ŏ-rÿt) A cosmic dust particle of mass less than about 10^–6 gram and diameter less than 0.1 mm. On impact with the Earth's atmosphere the heat absorbed by the particle from atmospheric friction is insufficient to raise it to boiling point. The ratio of heat radiated to heat absorbed is proportional to the inverse of the radius of a particle: those larger than 10^–6 gram ablate and form meteors; smaller ones do not. The micrometeorite will be decelerated to a normal free-fall velocity and then drift to the surface of the Earth. On the Moon, however, no deceleration occurs and they impact the surface with the normal geocentric velocity.

micrometeorite

[¦mī·krō′mē·dē·ə‚rīt] (astronomy) A very small meteorite or meteoritic particle with a diameter generally less than a millimeter.

micrometeorite

enUK

noun

Synonyms for micrometeorite

noun a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere

Synonyms

micrometeor
micrometeoroid

Related Words

meteorite

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