mosaicism

noun
mo·sa·i·cism | \ mō-ˈzā-ə-ˌsi-zəm \

Definition of mosaicism 

: the condition of possessing cells of two or more different genetic constitutions

Examples of mosaicism in a Sentence

Recent Examples on the Web

But scientists are also finding that mosaicism does not automatically equal disease. New York Times, "Every Cell in Your Body Has the Same DNA. Except It Doesn’t.," 21 May 2018 Most of the excess was found in the hippocampus, a region of the brain involved in memory, but not in other regions of the brain, nor in a completely different organ like the heart, suggesting a very specific impact on brain mosaicism. Robert Martone, Scientific American, "Early Life Experience: It’s in Your DNA," 10 July 2018 Some skin diseases proved to be caused by mosaicism, too. New York Times, "Every Cell in Your Body Has the Same DNA. Except It Doesn’t.," 21 May 2018 An article on Tuesday about the genetic condition mosaicism misstated the year in which Theodor Boveri died. New York Times, "Corrections: May 23, 2018," 22 May 2018 Preliminary studies suggest that mosaicism underlies many other diseases. New York Times, "Every Cell in Your Body Has the Same DNA. Except It Doesn’t.," 21 May 2018 However, the fact that the latest generation of tests are reporting higher rates of mosaicism in embryos raises questions about the validity of the diagnosis, Dr. Penzias says. Sumathi Reddy, WSJ, "IVF Testing Spurs a Debate Over ‘Mosaic’ Embryos," 21 Mar. 2018 These mosaic embryos can range from a little abnormal (20 percent) to a lot abnormal (up to 79 percent), based on an analysis of five cells, and there is already argument about what is a safe percentage of mosaicism to transfer. Stephen S. Hall, The Cut, "There could soon be a baby-boom among women who thought they’d hit an IVF dead end.," 17 Sep. 2017 Other concerns occur when only some of the embryo cells are repaired, called mosaicism. Amy Dockser Marcus, WSJ, "In Gene-Editing Advance, Scientists Correct Defect in Human Embryos," 2 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mosaicism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of mosaicism

1920, in the meaning defined above

Keep scrolling for more

Learn More about mosaicism

Statistics for mosaicism

Last Updated

12 Aug 2018

Look-up Popularity

Time Traveler for mosaicism

The first known use of mosaicism was in 1920

See more words from the same year

Keep scrolling for more

More Definitions for mosaicism

mosaicism

noun
mo·sa·i·cism | \ mō-ˈzā-ə-ˌsiz-əm \

Medical Definition of mosaicism 

: the condition of possessing cells of two or more different genetic constitutions

More from Merriam-Webster on mosaicism

Britannica.com: Encyclopedia article about mosaicism

Comments on mosaicism

What made you want to look up mosaicism? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to deposit or conceal in a hiding place

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!