Definition of homopolar in English:
 homopolar
adjective ˌhəʊmə(ʊ)ˈpəʊləˌhɒmə(ʊ)ˈpəʊlə
1Having equal or constant electrical polarity.
 Example sentencesExamples
-  Here, I survey the results of our investigation of the atomic structure of dislocation cores in homopolar semiconductors.
 -  In order for the homopolar motor to fully exploit the advantages of reduced size and weight, the field coils must be superconducting.
 -  When I was trying to understand homopolar machines recently, it was wonderful to find your ‘balancing D-cell’ homopolar motor at the end of this page.
 -  Here is about as simple a motor as you can get - the old homopolar motor.
 -  The magnetizing flux of a hybrid motor flows along the rotor axis, while the mechanism for rotor suspension is the same as that of the homopolar magnetic bearing.
 
- 1.1 (of an electric generator) producing direct current without the use of commutators.
 Example sentencesExamples
-  Figure 1 is a sectioned isometric view showing a homopolar generator.
 -  Each roller magnet in the Searl device is a small homopolar generator and the entire set of rollers create a radial Lorentz force too.
 -  I currently have measured results from a simple homopolar design I am using to experiment with.
 -  Since then, brush gear has been designed, manufactured and installed, and large-scale tests have been made with this gear in the homopolar generator.