Primary and secondary waves are body waves that travel within the Earth.

But without the initial pump-priming operation by the Government, there is little or no chance of attracting this secondary wave of employment.

He assumed that the secondary waves travelled only in the "forward" direction and it is not explained in the theory why this is the case.

He expelled most of the water in his lungs, then a secondary wave hit him and he found himself in an air-filled bubble.

It was the secondary wave he was looking for, the people who had been infected by the earlier carriers.

The incoming plane electron wave interacts with the atoms, and secondary waves are generated which interfere with each other.

All the secondary advanced waves cancel out the original advanced wave at the transmitter.

The backwash and secondary waves will probably last through tomorrow evening.

The wave displacement at any subsequent point is the sum of these secondary waves.

The hurling of blame constitutes a secondary wave of violence that leaves a second set of scars.