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tetracyclic

British  
/ ˌtɛtrəˈsaɪklɪk /

adjective

  1. chem (of a compound) containing four rings in its molecular structure

"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

Example Sentences

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The exception to the lower death rates was a class of older antidepressants known as heterocyclics, which include tricyclic and tetracyclic antidepressants.

From Reuters

The drugs tested in those studies included Prozac, as well as older and now less-popular medications known as monoamine oxidase inhibitors and tricyclic and tetracyclic antidepressants.

From Reuters

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.