What's the difference between axonometric/isometric/etc?

I here these terms intermingled all of the time between artists/designers/engineers, etc. Was wondering if you guys could help explain as simply as possible:

  • Axonometric
  • Isometric
  • Orthographic

axonometric vs isometric - Google Search for you

(please correct me i am wrong)

Isometric is a special case of Axonometric meaning all lenght are folded up to exhibit the correct length in all direction. Axo is the general Term for a display form where some lengths are displayed by true properties.

Orthographic is a 2d view from an object, meanin you see a square from a cube (that means if the cube lays flat on the axis and is not rotated of course)