preformationism
/ˌpriːfɔːˈmeɪʃ(ə)nɪz(ə)m/ /ˌpriːfɔːˈmeɪʃənɪz(ə)m/Biology and History of Science
noun
Belief in or advocacy of the theory of preformation.
Origin
Late 19th century; earliest use found in The Quarterly Review. From preformation + -ism.