Grus can refer to Grus (genus), a genus of birds in the crane family. Grus (constellation), the constellation "Crane" Grus (geology) or grit (geology), a clastic sediment composed of hard, often abrasive granules of a size range between sand and pebbles, typically from exfoliation of bedrock Grus, the historical sword of Boleslaw Krzywousty (Boleslaus the Wrymouthed), medieval prince of Poland.