: a terrestrial annelid worm (class Oligochaeta)
especially : any of a family (Lumbricidae) of numerous widely distributed hermaphroditic worms that move through the soil by means of setae and feed on decaying organic matter

Examples of earthworm in a Sentence

Recent Examples on the Web
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The earthworms around Sacramento will look a little different on Saturday. — Camila Pedrosa, Sacbee.com, 12 Oct. 2026 The goliath birdeater is an ambush predator and mostly feeds on earthworms, insects, frogs, and toads. — Encyclopedia Britannica, 9 Sep. 2026 In a work so dense with references, mistakes will sprout like crabgrass; write a big book on André Le Nôtre’s formal gardens and the earthworm experts will gather to deride your confusion. — Adam Gopnik, New Yorker, 7 Sep. 2026 Remember that plants will derive their nutrients from the soil, and microbes in the soil — think bacteria, fungi and earthworms — make those nutrients available to plants. — Pedro Moura, Los Angeles Times, 1 Sep. 2026 See All Example Sentences for earthworm

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of earthworm was in the 14th century

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Cite this Entry

“Earthworm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/earthworm. Accessed 17 Oct. 2026.

Kids Definition

earthworm

noun
: a long slender annelid worm that lives in damp earth, moves with the aid of bristles, and feeds on decaying organic matter

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