Origami Definitions

Paper positioning

When describing folding sequences and moves it is important to ensure that the paper is orientated
in the same way as the instructions have been written.
Therefore we will be using the following conventions;

Imagine that you are sat at a table. The nearest edge of the table to you is perfectly straight, and runs horizontally from left to right.
This edge is the "Horizontal Reference"- HR
Directions will use this HR as a base line
An imaginary line at 90 degrees to HR and parallel to the floor is the Vertical Reference - VR

"Vertical" - In a direction that is perpendicular to HR
"Horizontal" - In a direction that is parallel with HR
"Closest Edge" the edge of the model that is closest to you and the table's edge if the paper is lying on the table.
"Furthest Edge" The edge of the model that is furthest away from you if the paper is lying on the table.
"RAT" - Right Angled Triangle
"Raw Edge" - This is the edge of the original square.
"Top Layer" - When there are 2 or more layers, this is the layer of paper that is closest to the ceiling.
  (This layer may, itself, consist of more than one layer.)
"Left Hand" - left end of HR.
"Right Hand" - right end of HR.
"Crease" - verb. To fold and unfold.
"Crease" - noun. The mark left in the paper from a previous creasing.
"Fold" means to fold the paper into a specified position and to leave it there.
"Blintz" - Verb/noun. To fold all 4 corners of a square to the centre point (Steps 1-10)(named after traditional Russian pastry)
"Turn the paper over": Flip the paper from right to left, pivoting about VR. Similar to turning a page in a book.
"Rotate" - Without picking the paper up, revolve it about its centre point in the direction and angle specified