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						ballast
						
							noun
							
						
					
						
						
							 
							
								/ˈbæl.əst/
								
							
						
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									(nautical) Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability. | lastro | 
			
				
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									Coarse gravel or similar material laid to form a bed for roads or railroads, or in making concrete; track ballast. | balastro |