tube foot


: one of the small flexible tubular processes of most echinoderms that are extensions of the water-vascular system and are used especially in locomotion and grasping

Examples of tube foot in a Sentence

Recent Examples on the Web Underneath its body, two zigzagging rows of tube feet with 62 in each row, and another two rows with 45 tube feet per row, help the sea cucumber get around, researchers said. Irene Wright, Miami Herald, 1 July 2024 The new species was identified by its tube feet, tentacles and other subtle physical features, the study said. Aspen Pflughoeft, Miami Herald, 28 Mar. 2024 Its hunting efficacy stems from its spiny exterior and dexterous tube feet, enabling it to adeptly navigate and capture prey on the muddy seafloor. Anna Nordseth, Discover Magazine, 1 Mar. 2024 At first glance, starfish seem to be all limbs, with five appendages lined with rows of tube feet giving them their signature shape. Lori Youmshajekian, Scientific American, 3 Nov. 2023 Some use tiny tube feet to crawl, while others, like Synapta, move in undulating, wavelike motions. Shaena Montanari, National Geographic, 21 July 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'tube foot.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1888, in the meaning defined above

Time Traveler
The first known use of tube foot was in 1888

Dictionary Entries Near tube foot

Cite this Entry

“Tube foot.” Dictionary, Merriam-Webster, Accessed 25 Jul. 2024.

Kids Definition

tube foot

: one of the tiny tubes of most echinoderms (as a starfish or sea urchin) that are part of the water-vascular system and are used especially in movement and grasping

More from Merriam-Webster on tube foot

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