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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 ?
The virus identification from the positive allantoic fluid was done through hemagglutination inhibition test and the confirmation was done through RT-PCR (Siddique et al.
While egg yolk, albumen, allantoic fluid [2], and also amniotic fluid from turkey [3] have been extensively studied for some of their properties and chemical compositions, there are scant literature reporting the physical properties and chemical composition of the amniotic fluid of eggs from broiler breeders during late-incubation stage.
5% chick RBC suspension was added to the allantoic fluid in 1:1 ratio (50% v/v).
Total RNA was extracted with Trizol reagent (Invitrogen, Carlsbad, CA), according to the manufacturer's instructions (15), directly of the supernatant of the samples suspensions and of the allantoic fluid of embryonated eggs to negative control (ultrapure water).
The AI virus in collected Allantoic Fluid (AF) was diluted in sterile isotonic buffer (PBS at pH 7.
The allantoic fluid was collected aseptically for harvesting NDV in a bio-hazard cabinet with the help of Pasteur pipette in a conical flask while the sediments in test tubes were discarded.
The allantoic fluid tested negative through hemagglutination test and PCR for common duck viruses, including avian influenza virus, Newcastle disease virus and duck herpesvirus 1.
The volume of allantoic fluid varies upto 273 litres and such large amounts impose serious strain and greatly hamper respiration and reduce appetite in animals (Roberts, 2004; Noakes, 2009).
The reference strains of influenza A virus (A/PR/8/34-H1N1 and A/Udorn/307/72-H3N2) procured from CDC, Atlanta, GA, USA, and the pandemic H1N1-2009 (A/Delhi/1/2009-H1N1) isolated at our laboratory, to serve as positive control, were propagated to sufficiently high titres in 10-days old embryonated chicken eggs and the virus-containing allantoic fluid was harvested and stored in -80[degrees]C until use.
The allantoic fluid, about 5 mL in quantity was aspirated from every embryonated egg in to a 10 mL pipette and poured in to a sterilized ampoule at - 20oC (Arshad et al.
Allantoic fluid (AF) from two eggs selected randomly was harvested at an hourly interval and stored at -70[degrees]C.