noun
plural acids
chemistry :a chemical with a sour taste that forms a salt when mixed with a base [count]
An acid has a pH of less than 7. Very strong acids are able to burn holes in things. - compare 1base 6, ph
[noncount] slang :lsd
adjective
[more ~; most ~]
always used before a noun :of, relating to, or having the qualities of an acid
sharp, strong, and critical in tone
US