(~s)
Frequency: The word is one of the 3000 most common words in English.
1.
An ~ is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts. Some ~s burn or dissolve other substances that they come into contact with.
...citric ~...
N-MASS
2.
An ~ substance contains ~.
These shrubs must have an ~, lime-free soil.
ADJ
~ity
...the ~ity of rainwater.
N-UNCOUNT: oft N of n
3.
The drug LSD is sometimes referred to as ~. (INFORMAL)
N-UNCOUNT
4.
see also amino ~ , hydrochloric ~ , nitric ~ , nucleic ~ , sulphuric ~