Definitions of saltation:

• noun:   a mutation that drastically changes the phenotype of an organism or species
• noun:   (geology) the leaping movement of sand or soil particles as they are transported in a fluid medium over an uneven surface
• noun:   an abrupt transition
• noun:   a light springing movement upwards or forwards
• noun:   taking a series of rhythmical steps (and movements) in time to music