ambulacrum
noun
one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.
ambulacra
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pluralof ambulacrum.plural
The grammatical form denoting more than one person, place, thing, or idea.
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.
For this reason these narrower zones are called the ambulacra, while the broader zones intervening between them and supporting the spines are called the interambulacra.
From The Atlantic Monthly, Volume 10, No. 57, July, 1862 by Various
Of or pertaining to ambulacra; avenuelike; as, the ambulacral ossicles, plates, spines, and suckers of echinoderms.
From Webster's Unabridged Dictionary by Noah Webster
The fourth class of Pelmatozoa—the Edrioasteroidea—differs from the others in the structure of its ambulacra.
From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various
These suckers are called the ambulacra, the lines along which they run are called the ambulacral rows or zones, while the system of locomotion as a whole is known as the ambulacral system.
From Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. by Alexander Agassiz
Spencer to have had in its ambulacra an inner as well as an outer series of plates.
From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various
