Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to allantoic: allantoic diverticulum


n. pl. al·lan·to·i·des (ăl′ən-tō′ĭ-dēz′)
A membranous sac that develops from the posterior part of the digestive tract 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.

[New Latin allāntois, variant of allāntoīdēs, from Greek allāntoeidēs, sausage-shaped : allās, allānt-, sausage (perhaps from Greek dialectal (Magna Graecia) *allāwent-, (sausage) seasoned with garlic, from *allā-, garlic, of Italic origin; akin to Latin ālium, garlic; see allium) + -oeidēs, -oid.]

al′lan·to′ic (ăl′ən-tō′ĭk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.allantoic - relating to or characterized by an allantoisallantoic - relating to or characterized by an allantois
References in periodicals archive ?
1 except that intensive measurements of leaf ureide concentrations and degradation rates were made during the period of allantoic acid addition to the nutrient solution.
All of these samples were inoculated into the allantoic cavity of 9 to 11 day old chicken embryos and the allantoic fluids were harvested after 48 hrs.
cell culture, allantoic fluids) is well established and results in reasonable output (11,19,20), sequencing of nucleic acid clinical specimens is still challenging.
After fetal death, amniotic and allantoic fluids are resorbed, dehydrating fetal tissues and annex membranes.
The infective allantoic fluid was later used for pathotyping of isolates by employing biological characterization tools.
The chicken embryo died within 2-5 days post inoculation and showing IBV specific lesions were harvested allantoic fluid and 50% chicken infectious dose (EID50) was calculated 103 EID50 by inoculation of serial 10 fold dilution of virus in 10-day-old SPF embryonated chicken eggs.
Hemagglutination-positive allantoic fluids are collected, and viruses are subtyped by hemagglutination and neuraminidase inhibition (HI and NI) assays by using a panel of reference antiserum, as described by Huang et al.
The virus was propagated in allantoic cavity of 9 days old embryonated chicken eggs by the standard protocol (Dennis 2008) under sterile conditions.
Viral RNA from allantoic fluid was extracted with the RNeasy Mini Kit (QIAGEN, Hilden, Germany), and cDNAs were synthesized from the viral RNA by reverse transcription PCR by using a SuperScript First-Strand Synthesis System for RT-PCR Kit (Invitrogen, Carlsbad, CA, USA).
2 ml of stock viral suspension in each egg through the allantoic sac route.
2ml of inoculum into allantoic cavity of nine-day old embryonated chicken eggs.
Allantoic fluid of the 6 cultured specimens was then shipped to the University of Florida for confirmation testing and sequencing.