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plant of the family Liliaceae (lily family), of the same genus (Allium) as the chive (A. schoenoprasum), garlic (A. sativum), leek (A. porrum), and shallot (A. ascalonium).
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(in Russian, duchka, from Polish ducza, pit), a slope built of rock in a worked-out area of an underground coal mine. The ramp is used to bring the mineral down from overlying formations, to transport fill and reinforcement materials, and to provide communications between levels. During the working of the ore deposits, the short raises drilled upward from the haulage drift or crosscut to yield the ore broken out in the mining area are called ramps.
ii. The sharp-edged wedge with a sloping wall forming the inner wall of a supersonic inlet duct to create an oblique shock wave(s) and thus improve pressure recovery, especially at supersonic speeds. A ramp normally has a variable geometry.
iii. The platform at the rear of the aircraft or helicopter from which loading is done.