anamorphosis

from The Century Dictionary and Cyclopedia

• n. In perspec., a method of drawing which gives a distorted image of the object represented when it is viewed directly or nearly so, but a natural image when it is viewed from a certain point, is reflected by a curved mirror, or is seen through a polyhedron.
• n. In botany, an anomalous or monstrous development of any part of a plant, owing to some unusual condition affecting growth, so that it presents an appearance altogether unlike the typical form, as when the calyx of a rose assumes the form of a leaf.
• n. In zoology and botany, the gradual change of form, generally ascending, traced in a group of animals or plants the members of which succeed each other in point of time.