Tube-foot meaning

The definition of a tube foot is a fleshy tube that extends from the body of hard, spiny skeleton marine animals, used for movement, breathing and catching food.

An example of a tube foot is one of the five appendages of a starfish.

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One of the numerous external, fluid-filled muscular tubes of an echinoderm, such as a starfish or sea urchin, serving as organs of locomotion, food handling, and respiration.
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Any of numerous small, water-filled, fleshy tubes in most echinoderms, projecting outside the body, often ending in a suction disc, and used in locomotion, securing food, etc.
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One of the numerous external, fluid-filled muscular tubes of echinoderms, such as the starfish or sea urchin, used for locomotion, respiration, and grasping food or prey.
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A locomotor appendage of an echinoderm consisting of a tube with longitudinal muscles, pressurized by water.
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