acid

== English == === Etymology === From French acide, from Latin acidus (“sour, acid”), from aceō (“I am sour”). Doublet of agita. === Pronunciation === (Received Pronunciation, General American) enPR: ăs'ĭd, IPA(key): /ˈæsɪd/ Rhymes: -æsɪd === Adjective === acid (comparative acider, superlative acidest) Sour, sharp, or biting to the taste; tart; having the taste of vinegar. (figuratively) Sour-tempered. Of or pertaining to an acid; acidic. (music) Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock. ==== Quotations ==== For quotations using this term, see Citations:acid. ==== Synonyms ==== acidic ==== Antonyms ==== alkaline base ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === Noun === acid (countable and uncountable, plural acids) A sour substance. (chemistry) Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid. Any compound that easily donates protons to a base; a Brønsted acid. Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid. Any corrosive substance. (uncountable, slang) LSD, lysergic acid diethylamide. ==== Antonyms ==== alkali base ==== Hyponyms ==== See also Thesaurus:acid ==== Derived terms ==== ==== Descendants ==== → Welsh: asid ==== Translations ==== === See also === acerbic acro- pH === References === “acid”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC. === Anagrams === -adic, Daic, adic, cadi, caid == Albanian == === Noun === acid m (plural acide, definite acidi, definite plural acidet) (chemistry) acid Synonym: thartor ==== Declension ==== === Further reading === FGJSSH: Fjalor i gjuhës së sotme shqipe [Dictionary of the modern Albanian language]‎[2], 1980 “acid”, in FGJSH: Fjalor i gjuhës shqipe [Dictionary of the Albanian language] (in Albanian), 2006 == Dutch == === Etymology === Unadapted borrowing from English acid. Attested since at least 1970. === Pronunciation === === Noun === acid m (uncountable, no diminutive) (slang) LSD, lysergic acid diethylamide Synonym: LSD (music) acid == Romanian == === Etymology === Borrowed from French acide, from Latin acidus (“sour, acid”). === Pronunciation === IPA(key): [aˈt͡ʃid] === Adjective === acid m or n (feminine singular acidă, masculine plural acizi, feminine/neuter plural acide) acid, acidic ==== Declension ==== ==== Related terms ==== aciditate === Noun === acid m (plural acizi) acid ==== Declension ==== ==== Derived terms ==== acid dezoxiribonucleic === Further reading === “acid”, in DEX online—Dicționare ale limbii române (Dictionaries of the Romanian language) (in Romanian), 2004–2026 == Spanish == === Pronunciation === IPA(key): /ˈaθid/ [ˈa.θið̞] (Spain) IPA(key): /ˈasid/ [ˈa.sið̞] (Latin America, Philippines) Rhymes: -aθid (Spain) Rhymes: -asid (Latin America, Philippines) Syllabification: a‧cid === Adjective === acid (invariable) (music) acid === Noun === acid m (uncountable) (music) acid === Further reading === “acid”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025