Definition of slime mold
: any of a group (such as Myxomycetes) of organisms formerly held to be lower fungi but now often considered protists that exist vegetatively in usually moist habitats as mobile plasmodia and reproduce by spores
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Merriam-Webster unabridgedWords at Play
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Time Traveler for slime mold
The first known use of slime mold was in 1880
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