Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

H acid

noun

Definition of H acid

: a crystalline acid H2NC10H4(OH)(SO3H)2 made from napthalene and used as a dye intermediate; 8-amino-1-naphthol-3,6-disulfonic acid

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More about H acid

Dictionary Entries near H acid

haché

Hachioji

hachure

H acid

hacienda

hack

hackamatak

Statistics for H acid

Look-up Popularity

Comments on H acid

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

Show Comments  Hide Comments 

WORD OF THE DAY

resurrection

Listen to the pronounciation of resurrection

an act or instance of returning to life

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
True or False

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

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!

Words at Play
Ask the Editors
Word Games