- 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.
- the method of producing such a drawing.
- the gradual change in form from one type to another during the evolution of a group of organisms.
- (in certain arthropods) metamorphosis in which body parts or segments are added to those already present.
- optics
- an image or drawing distorted in such a way that it becomes recognizable only when viewed in a specified manner or through a special device
- the process by which such images or drawings are produced
- the evolution of one type of organism from another by a series of gradual changes
