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

The way the soil responds will give you an idea of whether your soil is acidic, alkaline, or neutral. — Lauren Landers, Better Homes & Gardens, 21 July 2026

Lemons provide slightly more vitamin C, while limes are more acidic, making both fruits healthy, versatile choices. — Heather Jones, Verywell Health, 20 July 2026

Participants who experienced rising segregation over time showed elevated levels of glial fibrillary acidic protein (GFAP) and neurofilament light chain (NfL), which reflect brain stress and nerve cell injury. — Samantha Agate, Charlotte Observer, 18 July 2026

The sandwich was herby and summery — a refreshing bite with the slightly acidic note of Morgana’s bread that elevated the bread well beyond anything from the store. — Sophie Lindberg, Kansas City Star, 17 July 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