ambulacrum
noun
one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.
ambulacral
-
a word derived from
ambulacrum.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Young Idyia in which the ambulacral tubes begin to ramify; magnified, letters as before.
From Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. by Alexander Agassiz
The left-hand figure shows one of the "ambulacral areas" enlarged, exhibiting the perforated plates.
From The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science by Henry Alleyne Nicholson
Aporita.—Pentamerous symmetry affects the food-grooves and thecal plates; probably also the nerves and ambulacral vessels, but not the gonads.
From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various
Half a young Sea-urchin immediately after resorption of the larva;s'' s'' spines, t' t' ambulacral tentacles.
From Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. by Alexander Agassiz
The mouth, which is surrounded by a circular tube, is not furnished with teeth, as in the Sea-urchin; but the end of each ambulacral ridge is hard, thus serving the purpose of teeth.
From Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. by Alexander Agassiz
