sealant

noun seal·ant \ ˈsē-lənt \

Definition of sealant

1 : a sealing agent
  • a radiator sealant
2 : a plastic material applied to parts of teeth with imperfections (such as pits and fissures) to prevent dental decay

Recent Examples of sealant from the Web

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

First Known Use of sealant

1944


SEALANT Defined for English Language Learners

sealant

noun

Definition of sealant for English Language Learners

  • : a substance that is put on a surface in order to protect it from air, water, etc.


Medical Dictionary

sealant

noun seal·ant \ ˈsē-lənt \

medical Definition of sealant

: a plastic material that is applied to parts of teeth (as the occlusal surfaces of molars and premolars) with imperfections (as pits and fissures) usually to prevent dental decay

Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

to remove or wipe out

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Add Diction

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!