preformation
/.pri:fɒ:'meiʃәn/
📖 中文释义
- n. 预先形成
- [医] 先成说, 预成说
📘 English Definition（英文释义）
- 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