Penetrant

Penetrant may refer to:

• Penetrant (biochemical), a chemical that increases the ability of a poison to apply its toxic effect to a living organism
• Penetrant (mechanical, electrical, or structural), service of structural item penetrating a fire-resistance rated wall or floor assembly
• Penetrating oil, lubricant

• Liquid penetrant, medium for Dye penetrant inspection
• Penetrance, in genetics, is the proportion of individuals carrying a particular variant of a gene