Standard Lemma guide

acidic

adj · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Australian, Canada, General-American, Received-Pronunciation: /əˈsɪd.ɪk/
  • Australian, Canada, General-American, Received-Pronunciation: əsĭdʹĭk
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: AH0 S IH1 D IH0 K Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Of or relating to acid; having the character of an acid.

Definition source: English Wiktionary via Wiktextract

Examples

  • an acidic solution

Meaning relationships

Synonyms: acid

Antonyms: none provided

2

adj

Meaning 2

Having a pH less than 7, or being sour, or having the strength to neutralize alkalis, or turning a litmus paper red.

Definition source: English Wiktionary via Wiktextract

Usage: physical

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: basic

3

adj

Meaning 3

Containing a high percentage of silica-bearing minerals.

Definition source: English Wiktionary via Wiktextract

Topics: geography, geology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: basic

4

adjective

Meaning 4

being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: alkaline, amphoteric

5

adjective satellite

Meaning 5

being sour to the taste

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: acid, acidulent, acidulous

Antonyms: none provided

History

Etymology

From acid + -ic. Doublet of acidy.

Across languages

Translations

56 source translations are retained for this English entry.

  • Asturian: ácidu — of or relating to acid
  • Belarusian: кі́слы (kísly) — of or relating to acid
  • Catalan: àcid — of or relating to acid
  • Esperanto: acida — of or relating to acid
  • Finnish: hapan — of or relating to acid
  • French: acide — of or relating to acid
  • Galician: ácido — of or relating to acid
  • Greek: όξινος (óxinos) — of or relating to acid
  • Hungarian: savas — of or relating to acid
  • Irish: aigéadach — of or relating to acid
  • K'iche': uch'amil — of or relating to acid
  • Norwegian: syrlig — of or relating to acid
  • Old English: āfor — of or relating to acid
  • Portuguese: ácido — of or relating to acid
  • Romanian: acid — of or relating to acid
  • Russian: кисло́тный (kislótnyj) — of or relating to acid
  • Russian: ки́слый (kíslyj) — of or relating to acid
  • Serbo-Croatian: kisèlīnskī — of or relating to acid
  • Spanish: ácido — of or relating to acid
  • Swedish: syra- — of or relating to acid
  • Swedish: syrlig — of or relating to acid
  • Turkish: asidik — of or relating to acid
  • Ukrainian: кисло́тний (kyslótnyj) — of or relating to acid
  • Asturian: ácidu — chemistry: having pH less than 7
  • Belarusian: кі́слы (kísly) — chemistry: having pH less than 7
  • Catalan: àcid — chemistry: having pH less than 7
  • Finnish: hapan — chemistry: having pH less than 7
  • French: acide — chemistry: having pH less than 7
  • Galician: ácido — chemistry: having pH less than 7
  • German: sauer — chemistry: having pH less than 7
  • Greek: όξινος (óxinos) — chemistry: having pH less than 7
  • Hebrew: חֻמְצִי (ẖumtzí) — chemistry: having pH less than 7
  • Hungarian: savas — chemistry: having pH less than 7
  • Indonesian: asam — chemistry: having pH less than 7
  • Irish: aigéadach — chemistry: having pH less than 7
  • Italian: acido — chemistry: having pH less than 7
  • Malayalam: അമ്ല (amla) — chemistry: having pH less than 7
  • Old English: āfor — chemistry: having pH less than 7
  • Polish: kwasowy — chemistry: having pH less than 7
  • Portuguese: ácido — chemistry: having pH less than 7
  • Romanian: acid — chemistry: having pH less than 7
  • Russian: кисло́тный (kislótnyj) — chemistry: having pH less than 7
  • Russian: ки́слый (kíslyj) — chemistry: having pH less than 7
  • Serbo-Croatian: kȉseo — chemistry: having pH less than 7
  • Spanish: ácido — chemistry: having pH less than 7
  • Swedish: sur — chemistry: having pH less than 7
  • Swedish: syrlig — chemistry: having pH less than 7
  • Tagalog: malala — chemistry: having pH less than 7
  • Turkish: asidik — chemistry: having pH less than 7
  • Ukrainian: кисло́тний (kyslótnyj) — chemistry: having pH less than 7
  • Ukrainian: ки́слий (kýslyj) — chemistry: having pH less than 7
  • Catalan: àcid — petrology: containing a high percentage of silica-bearing minerals
  • Finnish: hapan — petrology: containing a high percentage of silica-bearing minerals
  • Irish: aigéadach — petrology: containing a high percentage of silica-bearing minerals
  • Romanian: acid — petrology: containing a high percentage of silica-bearing minerals
  • Serbo-Croatian: kȉseo — petrology: containing a high percentage of silica-bearing minerals
Real reading context

acidic in complete knowledge articles