| allantoic v.’s |
paired vessels that accompany the allantois, growing out from the primitive hindgut and entering the connecting stalk of the early embryo; they fuse later into one vessel, the umbilical vein.
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| allantoidean |
1. pertaining to the allantois. 2. any animal with an allantois during its embryonic development; in the plural, amniotes is the more usual term.
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| allantoidoangiopagous |
joined by the vessels of the umbilical cord; see under twin.
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| allantoidoangiopagous t.’s |
twins joined by the vessels of the umbilical cord only; called also omphaloangiopagous t's.
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| allantoidoangiopagus |
twin fetuses joined by the vessels of the umbilical cord; allantoidoangiopagous twins. Called also omphaloangiopagus.
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