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deuterostome
2 dictionary results for: Deuterostome
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
deu·ter·o·stome 
[doo-ter-uh-stohm, dyoo-] Pronunciation Key
[doo-ter-uh-stohm, dyoo-] Pronunciation Key –noun
| 1. | Embryology. a mouth that develops separately from the blastopore. |
| 2. | Taxonomy. any member of the phyla (Chordata, Hemichordata, Echinodermata, Chaetognatha) in which the anus appears first, developing at or near the blastopore, cleavage is radial and indeterminate, and the mesoderm and coelom form from outgrowths of the primitive gut. |
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
The American Heritage Science Dictionary - Cite This Source - Share This
deuterostome
(d 'tə-rō-stōm') Pronunciation Key
Any of a major group of animals defined by its embryonic development, in which the first opening in the embryo becomes the anus. At this stage in their development, the later specialized function of any given embryonic cell has not yet been determined. Deuterostomes are one of the two groups of animals that have true body cavities (coeloms), and are believed to share a common ancestor. They include the echinoderms, chaetognaths, hemichordates, and chordates. Compare protostome. |
The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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