Histoire générale et particulière des anomalies de l’organisation chez l’homme et les animaux

The work Histoire générale et particulière des anomalies de l’organisation chez l’homme et les animaux by Isidore Geoffroy Saint-Hilaire is a four-volume text published between 1832 and 1837. In this work, Saint-Hilaire introduced the term teratology, which is the study of congenital abnormalities or significant deviations from the normal type in developing organisms. Saint-Hilaire, a French zoologist, focused on anatomical abnormalities found in both humans and lower animals. His father, Étienne Geoffroy Saint-Hilaire, also a naturalist, founded teratology and established the principle of "unity of composition," suggesting a single underlying structural plan for all animals.123