fluo·​ro·​sis flu̇-ˈrō-səs How to pronounce fluorosis (audio)
: an abnormal condition (such as mottling of the teeth) caused by fluorine or its compounds
fluorotic adjective

Keep scrolling for more

Example Sentences

Recent Examples on the Web All but 155 of them—20 that focused on tooth decay, and 135 that focused on dental fluorosis—failed to meet the two criteria. Charles C. Mann, The Atlantic, 17 Mar. 2020 Severe cases of fluorosis are crippling; most victims are elderly. Charles C. Mann, The Atlantic, 17 Mar. 2020 Den Besten has studied the role of fluoride in fluorosis, a condition that results from excess exposure to fluoride. Nadia Kounang, CNN, 19 Aug. 2019 Veneers can fix a number of dental issues including chipping, staining, old restorations and fillings, an uneven or narrow smile, spacing problems, crowding, a poor bite and even internal staining from antibiotics or fluorosis. Roxanne Adamiyatt, Town & Country, 28 Feb. 2019 While fluorosis only really occurs in young children with developing teeth, cutting down your own usage could also make that tube last longer. Caroline Picard, Good Housekeeping, 6 Feb. 2019 However, overdoing it on the fluoride at an early age can also cause a condition called dental fluorosis, or when the teeth undermineralize. Caroline Picard, Good Housekeeping, 6 Feb. 2019 Too much fluoride can also cause discoloration and pitting, a condition known as dental fluorosis, the CDC says. Korin Miller, SELF, 5 Feb. 2019 Dental fluorosis can vary in severity from mild tooth discoloration to severe staining, enamel erosion and pitting. OregonLive.com, 14 Dec. 2017 See More

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

Keep scrolling for more

Word History


New Latin

First Known Use

1927, in the meaning defined above

Time Traveler
The first known use of fluorosis was in 1927

Dictionary Entries Near fluorosis

Cite this Entry

“Fluorosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluorosis. Accessed 7 Oct. 2022.

Keep scrolling for more

Keep scrolling for more

Medical Definition



flu·​o·​ro·​sis ˌflu̇(-ə)r-ˈō-səs How to pronounce fluorosis (audio)
: an abnormal condition (as mottled enamel of human teeth) caused by fluorine or its compounds

More from Merriam-Webster on fluorosis

Love words? Need even more definitions?

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

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.