preformationism


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to preformationism: Germ-Plasm Theory

preformationism

(ˌpriːfɔːˈmeɪʃənɪzəm)
n
(Biology) the belief in the theory of preformation

preformationism

the theory that an organism is fully formed at conception and that reproduction is thereafter simply a process of growth. — preformationist, n.
See also: Biology
Mentioned in ?
References in periodicals archive ?
Strathausen begins each chapter with a particular event and introduces one or more important debates in the history of bioaesthetics, beginning with the eighteenth-century debate about preformationism and epigenesis and progresses to the ongoing controversy about sociobiology and neo-Darwinian theory.
Here the author shows his insider knowledge as a scientist who has done research in the field of epigenetics, which against genetic preformationism stresses the parallel developmental role of gene and environment.
Hence, genes represent a modern version of the traditional form-substance dualism and preformationism.
70) In Kant's time, epigenesis stood for the hypothesis that the embryo, in contrast to the view of preformationism, does not simply resemble an adult of its species and grow, but undergoes successive differentiation in developmental stages toward adulthood.
Women who consider abortion a moral option do so because their understanding of pregnancy, and thus of abortion, rejects the genetic preformationism that leads others to see the embryo as a distinct individual from the time of conception.