hypostasis

(noun) the suppression of a gene by the effect of an unrelated gene. Synonyms: epistasis.

(noun) the accumulation of blood in an organ.

(noun) any of the three persons of the Godhead constituting the Trinity especially the person of Christ in which divine and human natures are united. Synonyms: hypostasis of Christ.

(noun) (metaphysics) essential nature or underlying reality.