1. 
   P wave
   The first complex of the electrocardiogram, representing depolarisation of the atria; if the P wave is retrograde or ectopic in axis or form, it is labelled P'. ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?P+wave
   
   
2. 
   P wave
   a positive deflection in the normal surface electrocardiogram produced by the wave of excitation passing over the atria; it represents atrial depolarization, an intrinsic atrial event.
   Found op http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszS
   
   
3. 
   P wave
   A seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving. P waves are also known as compressional waves.
   Found op http://www.daviddarling.info/encyclopedia/P/P_wave.html
   
   
4. 
   P wave
   Type: Term Definitions: 1. the first complex of the electrocardiogram, during sinus and atrial rhythms, representing depolarization of the atria; if the P wave is retrograde or ectopic in axis or form, it is labeled P′.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=99692
   
   
5. 
   P wave
   Also called primary, longitudinal, irrotational, push, pressure, dilatational, compressional, or push-pull wave. P waves are the fastest body waves and arrive at stations before the S waves, or secondary waves. Their velocity in the crust varies between 5.0 and 7.0 km/s. The waves carry energy throu...
   Found op http://earthquakescanada.nrcan.gc.ca/info-gen/glossa-eng.php
   
   
6. 
   P wave
   P wave. A seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving.
   Found op http://www.sciencemaster.com/physical/item/earthquake_glossary.php
   
   
7. 
   P Wave
   List of albums released by Immortal Records. ...
   Found op http://en.wikipedia.org/wiki/P_Wave
   
   
8. 
   P wave
   [electrocardiography] In electrocardiography, during normal atrial depolarization, the main electrical vector is directed from the SA node towards the AV node, and spreads from the right atrium to the left atrium. This turns into the P wave on the ECG. The P wave is upright in II, III, and a...
   Found op http://en.wikipedia.org/wiki/P_wave_(electrocardiography)
   
   
9. 
   P-wave
   P-waves are a type of elastic wave, called seismic waves in seismology, that can travel through a continuum. If the continuum is made up of gases (as sound waves), solids and liquids, including the Earth. P-waves could be produced by earthquakes and recorded by seismographs. The name P-wave is ofte...
   Found op http://en.wikipedia.org/wiki/P-wave
   
   
10. 
    P-Wave
    A seismic body wave which propagate like sound waves, i.e. by compression and extension in the direction of travel. They can travel through solids and liquids and are the fastest of the seismic waves.
    Found op http://www.geologyrocks.co.uk/glossary/letter/m
    
    
11. 
    P-Wave
    A seismic wave that moves material in push-pull fashion in the direction of its travel. This type of seismic wave can travel through solids, liquids, and gases. Also called a primary wave.
    Found op http://www.physicalgeography.net/physgeoglos/p.html
    
    
12. 
    P-wave
    In seismology, a class of seismic wave that passes through the Earth in the form of longitudinal pressure waves at speeds of 6–7 kps/3.7–4.4 mps in the crust and up to 13 kps/8 mps in deeper layers, the speed depending on the density of the rock. P-waves from an earthquake travel faster than S-w...
    Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0056449.html
    
    

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