• noun
• synonym
• antonym

• noun
• synonym
• antonym

• Axis, the
  1. the countries, including Germany, Italy, and Japan, who fought together during World War II against the ALLIES
• axis of rotation (noun)
  1. the centre around which something rotates
• axis vertebra (noun)
  1. the 2nd cervical vertebra; serves as a pivot for turning the head
• coordinate axis (noun)
  1. one of the fixed reference lines of a coordinate system
• major axis (noun)
  1. the longest axis of an ellipse or ellipsoid; passes through the two foci
• minor axis (noun)
  1. the shorter or shortest axis of an ellipse or ellipsoid
• off-axis reflector (noun)
  1. a reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed
• optic axis (noun)
  1. in a doubly refracting crystal, the line in the direction of which no double refraction occurs
  2. a line that passes through the centre of curvature of a lens so that light is neither reflected nor refracted
• principal axis (noun)
  1. a line that passes through the centre of curvature of a lens so that light is neither reflected nor refracted
• semimajor axis (noun)
  1. one-half the major axis of an ellipse; the distance from the centre of an ellipse to one end
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