| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
| |
| allantois |
| |
| SYLLABICATION: | al·lan·to·is |
| PRONUNCIATION: |   -l n t - s |
| NOUN: | Inflected forms: pl. al·lan·to·i·des (l n-t-d z)
A membranous sac that develops from the posterior part of the alimentary canal in the embryos of mammals, birds, and reptiles. It is important in the formation of the umbilical cord and placenta in mammals. Also called allantoid. | | ETYMOLOGY: | New Latin, from allanto des, from Greek allantoeids, sausage-shaped : allas, allant-, sausage + -oeids, -oid. | | OTHER FORMS: | allan·toic (ln-tk) —ADJECTIVE
| | |
| |
| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
|
|
