a hypothetical individual organism that, by means of a fortuitous macromutation permitting an adaptive shift to a new mode of life, becomes the founder of a new type of organism and a vehicle of macroevolution.
LEARN THE SPANISH WORDS FOR THESE COMMON ANIMALS!
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Origin of hopeful monster
First recorded in 1933; phrase introduced by German geneticist Richard B. Goldschmidt (1879–1958)
Words nearby hopeful monster
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021