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ultrastructure

American  
[uhl-truh-struhk-cher] / ˈʌl trəˌstrʌk tʃər /

noun

Cell Biology.

  1. the structures of a cell that are revealed by electron microscopy.

ultrastructure British  
/ ˈʌltrəˌstrʌktʃə /

noun

  1. the minute structure of a tissue or cell, as revealed by microscopy, esp electron microscopy

"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

Other Word Forms

  • ultrastructural adjective

Etymology

Origin of ultrastructure

First recorded in 1935–40; ultra- + structure

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"U-ExM is transforming how we explore protist ultrastructure," said co-first author Armando Rubio Ramos, a Postdoctoral Fellow at the University of Geneva.

From Science Daily • Nov. 2, 2025

However, the ultrastructure and phylogenetic position of M. sporadica remain unknown.

From Science Daily • Feb. 6, 2024

A major determinant of industrial processing efficiency lies in secondary cell wall ultrastructure, which is dependent on interactions among these biopolymers.

From Nature • Jun. 10, 2014

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.