1. A unit of electrical resistance in the centimeter-gram-second (CGS) system, equal to 10⁻⁹ ohms.
Usage: technical; physics; rarely used in modern practice; the ohm is the standard SI unit

Examples

• The abohm was part of the CGS electromagnetic unit system.
• Modern electrical measurements use the ohm rather than the abohm.
• One abohm equals one billionth of an ohm.
• The abohm is an obsolete unit in contemporary physics.