A microfilm defect in the form of a compressed image that occurs when the film speed is reduced as the document passes through a rotary microfilmer.

1. A continuous function of a metric space to itself which moves each pair of points closer together.

2. The operation of setting one of the contravariant indices of a tensor equal to one of the covariant indices and summing over this index, yielding a tensor of order two less than that of the original tensor.

The action or process of becoming smaller or pressed together, as a gas on cooling.

Shortening of the fibers of muscle tissue.