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Definition of Echinoidea
1. Noun. Sea urchins and sand dollars.
Group relationships: Echinodermata, Phylum Echinodermata
Member holonyms: Sea Urchin, Exocycloida, Order Exocycloida, Order Spatangoida, Spatangoida
Generic synonyms: Class
Definition of Echinoidea
1. n. pl. The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See Spatangoid, Clypeastroid.
Medical Definition of Echinoidea
1.
Lexicographical Neighbors of Echinoidea
Literary usage of Echinoidea
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Cambridge Natural History by Arthur Everett Shipley, Sidney Frederic Harmer (1906)
"All doubt as to the relationship of the echinoidea to the Starfish is at once
dispelled in the mind of any one who sees one of the common species alive. ..."
2. Text-book of Comparative Anatomy by Arnold Lang, Ernst Heinrich Philipp August Haeckel (1896)
"Since it has not been proved that the radial plates of the echinoidea ...
The radials should then not be represented in the apical system of the echinoidea. ..."
3. A Treatise on Zoology by Edwin Ray Lankester (1900)
"CHAPTER XV. THE echinoidea.1 CLASS III. echinoidea. SUB-CLASS 1. ... KNOWLEDGE of
the echinoidea or Sea Urchins is more complete than that of any other of ..."
4. Annals and Magazine of Natural History by William Jardine (1872)
"On the Structure of the echinoidea. By S. LOVEN*. [Plate XIV. ... Their pedicel
has the reticulated texture typical of the echinoidea, which spreads more or ..."
5. Geological Magazine by Henry Woodward (1890)
"I.—SOME ADDITIONS TO THE AUSTRALIAN TERTIARY echinoidea. By J. WALTER GREGORY,
FGS, FZS, ... "A Revision of tie echinoidea from the Australian Tertiaries," ..."
6. Text-book of the Embryology of Invertebrates by Eugen Korschelt, Karl Heider, Edward Laurens Mark, William McMichael Woodworth, Matilda Bernard, Martin Fountain Woodward (1895)
"echinoidea.—According to the recent investigations of ... In the echinoidea the
formation of the mesenchyma reg-o- larly precedes gastrulation. ..."
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