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the structure visible only under the ultramicroscope and electron microscope.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Structures or particles seen with the electron microscope.
Synonym(s): fine structure
Farlex Partner Medical Dictionary © Farlex 2012
The detailed structure of a biological specimen, such as a cell, tissue, or organ, that can be observed only by electron microscopy. Also called fine structure.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
ultrastructurethe fine detail of CELL structure, which requires the use of the ELECTRON MICROSCOPE for proper visualization.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005