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1. (of a headache) intolerably painful; acute
2. (of the head) assailed by an overpowering unbearable pain
3. Psychoanal the Freudian defence mechanism in which an object or idea (or, alternatively, the ego) is separated into two or more parts in order to remove its threatening meaning
In the scope presentation of the standard loran (2000 kilohertz), signals the slow diminution of the leading or lagging edge of the pulse so that it resembles two pulses and eventually a single pulse, which appears to be normal but which may be displaced in time by as much as 10,000 microseconds; this phenomenon is caused by shifting of the E1 reflections from the ionosphere, and if the deformation is that of the leading edge and is not detected, it will cause serious errors in the reading of the navigational parameter.
Lamina of mica with a maximum thickness of 0.0012 inch (30 micrometers), split from blocks and thins.
One of a pair of horizontal level headings driven through a pillar, in pillar workings, in order to mine the pillar coal.
A defect in a painted surface; results from the penetration of solvents, contained in a fresh coat of paint, into an older layer of paint over which it has been applied; likely to occur when the old layer has been sanded too much.