This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of or pertaining to the chorioallantois

"His main effort was converting Goodpasture's method of growing vaccinia virus on the chorioallantoic membrane of the developing egg to provide a method of titration of viral infectivity and anti-viral antibodies, for several different viruses."

microporous    immunosorbent    tympanic    microfiltration    nanowire    semipermeable    perivascular    phagosome    drum-like    polyamide