51³Ô¹Ï

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acorn worm

or ²¹î€ƒc´Ç°ù²Ô··É´Ç°ù³¾î€…

noun

  1. any of several burrowing, often brilliantly colored hemichordates of the class Enteropneusta, usually found in intertidal sand and mud, having an acorn-shaped proboscis and collar.


acorn worm

noun

  1. any of various small burrowing marine animals of the genus Balanoglossus and related genera, having an elongated wormlike body with an acorn-shaped eversible proboscis at the head end: subphylum Hemichordata (hemichordates)
“Collins English Dictionary — Complete & Unabridged†2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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51³Ô¹Ï History and Origins

Origin of acorn worm1

First recorded in 1885–90
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Example Sentences

Examples have not been reviewed.

To locate the parts of the starfish body where head-coding genes are active, the researchers compared the genetic markers in a small Patiria miniata sea star with Saccoglossus kowalevskii, a species of acorn worm that is closely related to starfish and that has a well-studied genome.

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The researchers found that the genes in the head region of the acorn worm were “switched on†in the starfish’s bumpy skin, which covered its entire body.

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The enteropneust, also known as an acorn worm, lurks at the bottom of the Sirena Canyon.

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This creature is called an "acorn worm."

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In fact, this acorn worm is more closely related to sea stars and vertebrates like fish than it is to an earthworm.

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