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单词 saltationist
释义

WordReference Random House Unabridged Dictionary of American English © 2024
sal•ta•tion•ism  (sal tāshə niz′əm),USA pronunciation n. [Biol.]
  1. Biologyany of several theories holding that the evolution of species proceeds in major steps by the abrupt transformation of an ancestral species into a descendant species of a different type, rather than by the gradual accumulation of small changes.
  • saltation + -ism 1970–75
sal•tation•ist, n. 

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