dilute acid
Technical term used in chemistry to refer to an acid that has been diluted with water.
When handling dilute acid in experiments, caution is required.
Standard kanji spelling for 'dilute acid'.
Alternate kanji form using the older 稀 character; less common in modern usage.
Compound of 希 (dilute, rare) and 酸 (acid). The exact historical derivation is uncertain, but the term is a straightforward technical compound.