ultrastructure

noun

ul·​tra·​struc·​ture ˈəl-trə-ˌstrək-chər How to pronounce ultrastructure (audio)
: biological structure and especially fine structure (as of a cell) not visible through an ordinary microscope
ultrastructural adjective
ultrastructurally adverb

Word History

First Known Use

1939, in the meaning defined above

Time Traveler
The first known use of ultrastructure was in 1939

Dictionary Entries Near ultrastructure

Cite this Entry

“Ultrastructure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrastructure. Accessed 22 Sep. 2023.

Medical Definition

ultrastructure

noun
ul·​tra·​struc·​ture ˈəl-trə-ˌstrək-chər How to pronounce ultrastructure (audio)
: biological structure and especially fine structure (as of a cell) not visible through a light microscope
ultrastructurally adverb
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