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the world > the universe > constellation > comet or meteor > meteor > [noun] > meteorite > achondrite > types of (4)
eucrite1881

Astronomy. Any of a group of achondritic meteorites principally composed of anorthite and pigeonite.

howardite1881

Astronomy. Any of a group of achondritic meteorites principally composed of hypersthene and anorthite.

nakhlite1916

Any of a class of achondritic stony meteorites which originate from Mars and are rich in augite.

ureilite1916

Any of a group of calcium-poor achondrite meteorites that consist mainly of olivine and pigeonite.

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