. | 1. | a drawing presenting a distorted image that appears in natural form under certain conditions, as when viewed at a raking angle or reflected from a curved mirror. |
| 2. | the method of producing such a drawing. |
| 3. | Zoology, Entomology. the gradual change in form from one type to another during the evolution of a group of organisms. |
| 4. | (in certain arthropods) metamorphosis in which body parts or segments are added to those already present. |