Acidly

ac·id  (sd)

n.

1. Chemistry

a. Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.

b. A substance that yields hydrogen ions when dissolved in water.

c. A substance that can act as a proton donor.

d. A substance that can accept a pair of electrons to form a covalent bond.

2. A substance having a sour taste.

3. The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.

4. Slang See LSD¹.

adj.

1. Chemistry

a. Of, relating to, or containing an acid.

b. Having a high concentration of acid.

c. Having the characteristics of an acid.

2.

a. Having a pH of less than 7.

b. Having a relatively high concentration of hydrogen ions.

3. Geology Containing a large proportion of silica: acid rocks.

4. Having a sour taste. See Synonyms at sour.

5. Biting, sarcastic, or scornful: an acid wit; an acid tone of voice.

---

[From Latin acidus, sour, from acre, to be sour; see ak- in Indo-European roots.]

---

acid·ly adv.

acid·ness n.