acidic

adjective

acid·​ic ə-ˈsi-dik 

a-

1

: acid-forming

2

: acid

Synonyms of acidic

• acid
• sour

Examples of acidic in a Sentence

The soil in our garden is very acidic.

the acidic water of a polluted lake

Recent Examples on the Web

To set your lettuce up for success, plant it in an area with full sun and slightly acidic, well-draining soil. — The Spruce, 24 Sep. 2026

Avoid using foil for brining, storing leftovers, or baking cookies, and discard foil with grease, acidic residue, moisture, or tears. — Heather Riske, Better Homes & Gardens, 24 Sep. 2026

Estrogen loss thins the vaginal tissue and changes the microbiome, leading to a less acidic environment -- a breeding ground for harmful bacteria that cause UTIs. — Laura Trujillo, USA Today, 22 Sep. 2026

Lime green piping traced an aubergine silk skirt; flashes of acidic color appeared on necklines and linings. — Anna Cafolla, Vogue, 21 Sep. 2026

Word History

Etymology

acid entry 1 + -ic entry 1

First Known Use

1866, in the meaning defined at sense 1

Rhymes for acidic

• davidic
• fluidic
• hasidic

Kids Definition

acidic

adjective

acid·​ic ə-ˈsid-ik 

a-

1

: acid-forming

2

: acid

Medical Definition

acidic

adjective

acid·​ic ə-ˈsid-ik, a- 

1

: acid-forming

2

: acid