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[stroh-muh] /ˈstroʊ mə/
noun, plural stromata
[stroh-muh-tuh] /ˈstroʊ mə tə/ (Show IPA)
Cell Biology. the supporting framework or matrix of a cell.
Anatomy. the supporting framework, usually of connective tissue, of an organ, as distinguished from the parenchyma.
Mycology. (in certain fungi) a compact, somatic mass of fungous tissue, in or on which the fructifications may be developed.
Botany. the matrix of a chloroplast, containing various molecules and ions.
Origin of stroma
1825-35; < Late Latin strōma mattress < Greek strôma bed-covering; akin to Latin sternere to spread, strew, strātum (see stratum)
Related forms
[stroh-mat-ik] /stroʊˈmæt ɪk/ (Show IPA),
stromal, stromatous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for stromata


noun (biology) (pl) -mata (-mətə)
the gel-like matrix of chloroplasts and certain cells
the fibrous connective tissue forming the matrix of the mammalian ovary and testis
a dense mass of hyphae that is produced by certain fungi and gives rise to spore-producing bodies
Derived Forms
stromatic (strəʊˈmætɪk), stromatous, adjective
Word Origin
C19: via New Latin from Late Latin: a mattress, from Greek; related to Latin sternere to strew
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for stromata



1832, in anatomy, plural stromae, Modern Latin, from Latin stroma "bed covering," from Greek stroma "anything spread out for lying or sitting on" (see structure (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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stromata in Medicine

stroma stro·ma (strō'mə)
n. pl. stro·ma·ta (-mə-tə)

  1. The connective tissue framework of an organ, a gland, or other structure, as distinguished from the tissues performing the special function of the organ or part.

  2. The spongy and colorless framework of a cell.

stro'mal adj.
stro·mat'ic (-māt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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