n. pl. hy·pos·ta·ses (-sēz′)
1. Philosophy The substance, essence, or underlying reality.
a. Any of the persons of the Trinity.
b. The essential person of Jesus in which his human and divine natures are united.
3. Something that has been hypostatized.
a. A settling of solid particles in a fluid.
b. Something that settles to the bottom of a fluid; sediment.
5. Medicine The settling of blood in the lower part of an organ or the body as a result of decreased blood flow.
6. Genetics A condition in which the action of one gene is concealed or suppressed by the action of an allele of a different gene that affects the same part or biochemical process in an organism.
[Late Latin, from Greek hupostasis : hupo-, hypo- + stasis, a standing; see stā- in the Appendix of Indo-European roots.]
hy′po·static (hī′pə-stătĭk), hy′po·stati·cal adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus