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alkaline-earth metal any of a group of highly reactive chemical elements, such as calcium and magnesium, that are typically divalent cations and form compounds with various other elements.
down-to-earth practical, straightforward, sensible, and realistic. [2 definitions]
earth mother (sometimes caps.) the planet earth conceived of as the source of all life. [2 definitions]
earth science Earth science is the study of the planet Earth. Earth science is especially interested in what the planet is composed of, its weather, and how the planet developed and continues to change over time. Many different sciences, such as geology and meteorology--the study of weather--are part of earth science.
earth tone any of the muted colors found in nature, such as beige, gray, or moss green.
earth-friendly of or pertaining to a product or process that causes minimal harm to the environment.
earthbound limited or confined to earth or earthly matters. [3 definitions]
fuller's earth a very absorbent clay used esp. in fulling woolen cloth and also as a filter, dusting powder, catalyst, and the like.
rare earth any oxide of a rare-earth metal. [2 definitions]
rare-earth metal any of the series of chemical elements, all metals, that have from fifty-seven to seventy-one protons per atom; lanthanide series.
the salt of the earth a very good-hearted and decent person or group of people.