Meaning of acid
Pronunciation: (as'id), [key]
- a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base. Acids are proton donors that yield hydronium ions in water solution, or electron-pair acceptors that combine with electron-pair donors or bases.
- a substance with a sour taste.
- something, as a remark or piece of writing, that is sharp, sour, or ill-natured: His criticism was pure acid.
- See(def. 2).
- to importune someone, as for money, sexual favors, or confidential information.
- an acid phosphate.
- belonging or pertaining to acids or the anhydrides of acids.
- having only a part of the hydrogen of an acid replaced by a metal or its equivalent:an acid phosphate.
- having a pH value of less than 7. Cf. alkaline (def. 4).
- sharp or biting to the taste; tasting like vinegar; sour: acid fruits.
- sharp, biting, or ill-natured in mood, manner, etc.: an acid remark; an acid wit.
- containing much silica.
- noting, pertaining to, or made by a process in which the lining of the furnace, or the slag that is present, functions as an acid in high-temperature reactions in taking electrons from oxide ions: usually a siliceous material, as sand or ganister. Cf. basic (def. 3).
- acid (Thesaurus)