Term: shock wave: a region of high pressure travelling through a gas at a high velocity
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: onion mildew: fungus causing a downy mildew on onions
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: masked ball: a ball at which guests wear costumes and masks
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: duodecimal notation: any notation that uses 12 different characters
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: ixodes dammini: a northeastern tick now recognized as same species as Ixodes scapularis
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: ageratina: annual to perennial herbs or shrubs of eastern United States and Central and South America
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: petabyte: a unit of information equal to 1024 tebibytes or 2^50 bytes
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: hollowware: silverware serving dishes
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: triturus: chiefly aquatic salamanders
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: difficulty: a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: preemptive bid: a high bid that is intended to prevent the opposing players from bidding