- Formation of a sediment at the bottom of a liquid.
- The phenomenon whereby the phenotype that would ordinarily be manifested at one locus is obscured by the genotype at another epistatic locus; in humans, the phenotype for the ABO blood group locus can be expressed only in the presence of its precursor, H substance. The Bombay factor in the homozygous state blocks H formation and obscures the ABO phenotype.
Synonym(s): hypostatic congestion
[G. hypo-stasis, a standing under, sediment]
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