1. Dinornithiformes a ratite bird order: recently extinct flightless birds of New Zealand
  2. reference frame a system that uses coordinates to establish position
  3. cantus firmus a melody used as the basis for a polyphonic composition
  4. transform change or alter in appearance or nature
  5. Lorentz force the force experienced by a point charge moving along a wire that is in a magnetic field; the force is at right angles to both the current and the magnetic field
  6. transformed given a completely different form or appearance
  7. transformer an electrical device changing one voltage to another
  8. Sphenisciformes penguins
  9. rendezvous a meeting planned at a certain time and place
  10. difference limen the smallest change in stimulation that a person can detect
  11. deference courteous regard for people's feelings
  12. inference drawing a conclusion on the basis of circumstantial evidence
  13. different unlike in nature, quality, form, or degree
  14. Torpediniformes rays with bodies shaped like torpedoes
  15. difference of opinion a disagreement or argument about something important
  16. verse form a composition written in metrical feet forming rhythmical lines
  17. free enterprise an economy relying on market forces to allocate resources
  18. differentiator a person who (or that which) differentiates
  19. securities firm a stock broker's business
  20. transference the act of moving something from one form to another

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