plural of Riess spiral

plural of purity spiral

plural of Langmuir spiral

plural of defensive spiral

A staircase in the form of a helix.

A series of thoughts or actions which feeds back into itself, causing a situation to become progressively worse. It is worse than a vicious circle, which is self-sustaining in its current state.

(sports) A long pass in American football or rugby in which the ball is given a brisk spin (about its longitudinal axis) as it is thrown so that it travels in a smooth arc without tumbling or wobbling.

plural of spiral pass

(mathematics) A spiral that increases in distance from the point of origin at a constant rate.

(mathematics) A spiral that increases in distance from the point of origin at a constant rate.