subgerminal en · ADJ
Etymology
From sub- + germinal.
Meanings
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(not-comparable) Below the germinal disc.
Even before a chicken egg is laid, cells with greater amounts of yolk begin falling into a subgerminal cavity beneath the blastoderm.
2000, Richard Grossinger, Phoebe Gloeckner, Jillian O'Malley, Embryogenesis: Species, Gender, and Identity, page 179: