Acid-free

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Alkaline or neutral; not acidic.

    "an acid-free soil"

  2. 2
    Without using acid.

    "an acid-free etching technique"

Synonyms

All synonyms
acidless

Etymology

From acid + -free.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.