1. the concentration of chloride ions in seawater, expressed as the mass of chloride in grams per kilogram of seawater
Usage: technical; oceanography

Examples

• The chlorinity of ocean water is typically around 19 parts per thousand.
• Scientists measure chlorinity to understand the salinity and composition of seawater.
• Chlorinity values can vary slightly depending on the location and depth of the water sample.
• The chlorinity test is a standard procedure in marine chemistry laboratories.