n.
1.(geology) the leaping movement of sand or soil particles as they are transported in a fluid medium over an uneven surface
2.a mutation that drastically changes the phenotype of an organism or species
3.an abrupt transition
4.taking a series of rhythmical steps (and movements) in time to music
5.a light springing movement upwards or forwards
Idiom of the Day
read the riot act (to someone)
to give someone a strong warning or scolding
The teacher read the riot act to her students when they began to misbehave in class.