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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 pre·for·ma·tion /ˌprifɔrˈmeʃən/
 預先形成

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 pre·for·ma·tion /ˌprɪfɔrˈmeʃən/ 名詞
 先成論,先成說

From: Webster's Revised Unabridged Dictionary (1913)

 Pre·for·ma·tion n. Biol. An old theory of the preëxistence of germs.  Cf. Emboîtement.
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From: WordNet (r) 2.0

 preformation
      n : a theory (popular in the 18th century and now discredited)
          that an individual develops by simple enlargement of a
          tiny fully formed organism (a homunculus) that exists in
          the germ cell [syn: theory of preformation]