# Terminology

There appears to be some confusion as to the meanings of the terms semi-regular, demi-regular, quasi-regular etc. I shall use the following scheme instead.

- Monomorphic – consisting of one shape of tile only
- Bimorphic – consisting of two shapes of tile
- Trimorphic - consisting of three shapes etc.

- Regular – consisting of regular polygons only (ie equi-lateral and equi-angular polygons)
- Equilateral – consisting of polygons with equal sides (eg a rhombus)
- Irregular – containing at least one irregular polygon

- First order – containing vertices of one type only (ie all verticese are identical)
- Second order – having two kinds of vertex
- Third order – having three kinds of vertex etc.

- Conformal – in which all the vertices coincide with vertices of another polygon
- Non-conformal – in which vertices of one polygon lie on the edge of another

Easy Tiler only deals with conformal tilings - so you cannot produce tilings like the bricks in a wall.