名詞 preformation:

1. 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
   同義詞：theory of preformation

pre.for.ma.tion

n.（名詞）
The act of shaping or forming in advance; prior formation.
預(yù)先形成：預(yù)先塑造或形成的行為；預(yù)先形成
A theory popular in the 8th century that all parts of an organism exist completely formed in the germ cell and develop only by increasing in size.
預(yù)成說：流行于8世紀(jì)，認(rèn)為生物體的所有部分在生殖細(xì)胞時已完全成形而成長時只是增加尺寸的理論