Word.ws English Dictionary

acid-free

acid-free adjective: alkaline or neutral; not acidic.

Adjective

acid-free (comparative more acid-free, superlative most acid-free)

  1. Alkaline or neutral; not acidic.
    • an acid-free soil
    • Printed on acid-free paper.
  2. Without using acid.
    • an acid-free etching technique

Forms of acid-free

comparativemore acid-free
superlativemost acid-free

Origin of acid-free

From acid + -free.

Questions about acid-free

What does acid-free mean?
Acid-free means alkaline or neutral; not acidic.
What part of speech is acid-free?
Acid-free is an adjective.

Words near acid-free in the dictionary

  1. acid-base pair
  2. acid-base pairs
  3. acid-fast
  4. acid-fastness
  5. acid-forming
  6. acid-free
  7. acid-proof
  8. acid-resistant
  9. acid-stable
  10. acid-tongued
  11. acid-wash

Source and license

Adapted from Wiktionary: acid-free (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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