1. a device, substance, or agent that allows something to pass through or penetrate a material or barrier
Usage: technical; often used in chemistry, engineering, and materials science
2. something that permeates or spreads throughout a space or medium
Usage: less common

Examples

• The chemical acts as a permeator, allowing water molecules to pass through the membrane.
• Engineers designed a permeator to separate gases in the industrial process.
• The dye served as a permeator, spreading evenly through the fabric.
• A permeator device was used to test the material's porosity.
• The salt solution functioned as a permeator in the osmosis experiment.