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Comprehensive
Dictionary Suite
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D layer the lowest layer of the ionosphere, about forty-five to eighty miles above the earth.
forty-five a forty-five caliber pistol or revolver, or a cartridge of .45 inches in diameter to be used in such a gun. [2/3 definitions]
oblique of military march, at an angle of forty-five degrees. [1/5 definitions]
octant a navigational instrument like the sextant but with an angle of only forty-five degrees. [2/4 definitions]
rhodium a chemical element that has forty-five protons in each nucleus and that occurs in pure form as a silvery-white, very corrosion-resistant metal, used esp. to electroplate instruments and jewelry and as a catalyst. (symbol: Rh)
wide-angle lens a camera lens that covers an angle of view of forty-five degrees or more.