chorion
A protective, noncellular membrane that surrounds the eggs of various animals including insects and fish. [ https://www.worldcat.org/search?q=bn%3A0721662544 ]
Term info
chorion
goslim_pir
Note that this term does not refer to the extraembryonic membrane surrounding the embryo of amniote vertebrates as this is an anatomical structure and is therefore not covered by GO.
cellular_component
GO:0042600