| allantoic sac | The dilated distal portion of the allantois; it forms part of the placenta in many mammals. (05 Mar 2000) |
|---|---|
| allantoic vesicle | The hollow portion of the allantois. (05 Mar 2000) |
| allantoid | <anatomy> A membranous appendage of the embryos of mammals, birds, and reptiles, in mammals serving to connect the foetus with the parent; the urinary vesicle. Source: Websters Dictionary (01 Mar 1998) |
| allantoid membrane | An embryonic diverticulum of the hindgut of reptiles, birds, and mammals; in man its blood vessels give rise to those of the umbilical cord. (12 Dec 1998) |
| allantoidal | <anatomy> Of or pertaining to the allantois. Origin: Gr. Shaped like a sausage; sausage + form. Source: Websters Dictionary (01 Mar 1998) |
| allantoidea | <zoology> The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals. Source: Websters Dictionary (01 Mar 1998) |
| allantoidoangiopagus | Synonym: omphaloangiopagus. See: allantoidoangiopagous twins. Origin: allantoid + G. Angeion, vessel, + pagos, fastened (05 Mar 2000) |
| allantoin | <pharmacology> Any of many nitrogen-containing organic compounds which are found in some plants and in the urine of some mammals. Allantoin is used to treat wounds and ulcers. (09 Oct 1997) |
| allantoinase | <enzyme> An enzyme (an amidohydrolase) that catalyses the hydrolysis of allantoin to allantoic acid. (05 Mar 2000) |
| allantoinuria | The urinary excretion of allantoin; normal in most mammals, abnormal in humans. Origin: allantoin + G. Ouron, urine (05 Mar 2000) |
| allantois | An embryonic diverticulum of the hindgut of reptiles, birds, and mammals; in man its blood vessels give rise to those of the umbilical cord. (12 Dec 1998) |
| allatostatin | <hormone> Peptide hormones produced by the corpora allata of insects that reversibly inhibit the production of juvenile hormone. Similar peptides are found in other Phyla. Allatostatin 4, smallest of the family, is DRLYSFGL amide. Allatostatins may also be produced in other insect tissues, particularly mid gut. (18 Nov 1997) |
| allaxis | Synonym: metamorphosis. Origin: G. Allattein, to alter (05 Mar 2000) |