n. The biochemical production of fat, especially the conversion of carbohydrate into fat so that it may be stored as a long-term source of energy when food is scarce
The Century Dictionary and Cyclopedia
n. The formation of fat.
Word Usage
"When the body deals with more carbohydrate than can be burned or crammed into the cells as glycogen, it converts them in a process called lipogenesis into palmitic acid."