- isogonal trajectory
- isogonal transform
- isogonal transformation
- isogonal trapezoid
- isogonic center
- isogonic (= isogonical)
- isogonic mapping
- isogonic point
- isogonological triangle
- isogram
- isograph
- isohedra (isohedron的复数形式）
- isohedral
- isohedral tiling
- isohedron
- isohypse
- isol
- isolable
- isolated
- isolated compact set
- isolated component
- isolated cutpoint
- isolated double point
- isolated edge
- isolated element