Did you know?

Click any word in a definition or example to find the entry for that word

subatomic particle - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

noun [countable] science     subatomic particle pronunciation in American English
/ˌsʌbəˈtɑmɪk ˌpɑrtɪk(ə)l/
Word Forms
singularsubatomic particle
pluralsubatomic particles
  1. an extremely small part of matter that forms part of an atom or is smaller than an atom
quiz invitation


the practice of looking at a product online before going to a conventional store to buy it

BuzzWord Article

Open Dictionary


a person who has or claims to have a lot of influence

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog
Macmillan learn live love play