n.[C][U]

1. 變形；質變；（外形等的）完全變化[（+into）]
   She's undergone quite a metamorphosis since you last saw her.

   自你上次見到她以來，她已完全變了一個樣子。

2. 變成的形態
3. 【生】變態
   the metamorphosis from a tadpole to a frog

   由蝌蚪演變為青蛙

4. 【醫】（某些組織的）變態

n.

1. Zoology  (in an insect or amphibian) the process of transformation from an immature form to an adult form in two or more distinct stages.
2. a complete change in form or nature.