“arsonic”

We have one entry that includes the term arsonic.

arsonic acid

noun

: any of a series of organic acids (such as the arsanilic acids) having the general formula RAsO(OH)2 and obtainable by oxidizing monosubstituted organic arsines (such as phenyl-arsine C6H5AsH2)

See the full definition

Word of the Day

Listen to the pronunciation of effusive

See Definitions and Examples »

Test Your Vocabulary

Challenging Standardized Test Words, Vol. 2

  • a pencil broken in half on top of a test answer sheet
  • The business’s new computer system proved not to be a panacea.
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.

Pick the best words!

PLAY
Love words? Need even more definitions?

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

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
burrowing owl athene cunicularia tilts its head outside its burrow on marco island florida
Guess the Curious Origins of These Everyday Words Oh, that’s where that comes from…
See All