(in an echinoderm) each of a large number of small flexible hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system.
〔动〕（棘皮动物的）管足
Example sentencesExamples
We demonstrate that there is considerable variation in tube-foot morphology among members of the Asteroidea including an entirely new type of flat-tipped, non-suckered tube foot in species belonging to the order Valvatida.
Each canal has a lateral connection which leads to a tube foot, which may be composed of three parts.
Scanning electron microscopy revealed that the tube feet of Acodontaster conspicuus lacked suckers, with no distinct concavity in the center of the disc, as seen in a typical flat-tipped suckered tube foot.
This indicates that considerable morphological change occurs in the post-juvenile tube foot.
Each tube foot is made of an ampulla, podium, and usually a sucker.
Definition of tube foot in US English:
tube foot
noun
usually tube feetZoology
(in an echinoderm) each of a large number of small flexible hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system.
〔动〕（棘皮动物的）管足
Example sentencesExamples
Each canal has a lateral connection which leads to a tube foot, which may be composed of three parts.
Scanning electron microscopy revealed that the tube feet of Acodontaster conspicuus lacked suckers, with no distinct concavity in the center of the disc, as seen in a typical flat-tipped suckered tube foot.
We demonstrate that there is considerable variation in tube-foot morphology among members of the Asteroidea including an entirely new type of flat-tipped, non-suckered tube foot in species belonging to the order Valvatida.
This indicates that considerable morphological change occurs in the post-juvenile tube foot.
Each tube foot is made of an ampulla, podium, and usually a sucker.