from The Century Dictionary.
- Of or pertaining to the allantois: as, allantoic fluid; allantoic acid; allantoic placentation.
from the GNU version of the Collaborative International Dictionary of English.
- adjective Pertaining to, or contained in, the allantois.
- adjective (Chem.) See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Of, pertaining to or derived from the
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adjective relating to or characterized by an allantois
Sorry, no etymologies found.
I am sorry to have to tell you that it is grown in an embryonic chicken or in the allantoic fluids that surround it in the egg.
The allantoic fluids in which the flu vaccine is grown, contain a white crystalline substance called allantoin.
From about 1940 Burnet's main interest in virology was influenza virus. 9 He showed that influenza virus could be isolated from human cases by inoculation of throat washings into the amniotic sac, and a year later that virus isolated in this way could be quickly adapted to grow in the allantoic sac.
Exploration of the mechanism provided his first essay into influenza virus genetics, the demonstration that the "O-D change" which made possible growth in the allantoic sac was due to a mutation, a phenomenon that had not been demonstrated with animal viruses at that time.
The hypothesis that these anomalous effects could result from the release by neoplastic cells of a soluble, diffusible agent which altered the differentiative and growth properties of its target cells, received full confirmation from experiments transplanting one or the other mouse sarcoma onto the chorio-allantoic membrane of 4 to 6-day chick embryos, in such a position as to prevent direct contact between embryonic and neoplastic tissues (Fig. 2).
Dollo followed up this suggestion, which had in the meantime been strengthened by Hill's discovery of a true allantoic placenta in
Cenogenetic processes, on the other hand, include such phenomena as the formation of yolk and the embryonic membranes, the temporary allantoic circulation, the navel, the curved and contracted shape of the embryo, and the like.
To those who know nothing of the stimulating power of the Aristotelian biological works, Albert's description of the embryos of fish and his accurate distinction of their mode of development from that of birds, by the absence of an allantoic membrane in the one and its presence in the other, must surely be startling.
The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield
Diagram showing later stage of allantoic development with commencing constriction of the yolk-sac.
Blood is carried to the allantoic sac by the two allantoic or umbilical arteries, which are continuous with the primitive aortæ, and after circulating through the allantoic capillaries, is returned to the primitive heart by the two umbilical veins.