Inch smiled, a slow spread of lips that revealed broken teeth.

He was getting fat, a slow but sure middle-aged spread taking over.

A relatively low rate may imply a slow or negligible spread in large groups.

And then I was rewarded by the slow spread of his old smile across his face.

The brightest side of American history has been the slow but persistent spread of egalitarianism.

The slow spread of the radioactive tritium became a hot-button issue.

There was strong evidence of a slow but methodical spread of this knowledge.

One factor in this was the slow spread of plant ice into India.

More than anything, television's rhythms have been disturbed by the slow spread of this deadly virus called repeats.

He didn't have to close his eyes to visualize the march of humanity across the valley, the slow spread of their cities.