A negative terminal is the grounded terminal on a car battery, typically marked by a minus (-) sign. It is usually color-coded black. The other terminal is positive, usually color-coded red or orange, and marked with a plus (+) sign. The grounded terminal connects to a grounded source on the vehicle, typically a bolt in the chassis.
also jack-boot (jÄkâ²boÍotâ²) n. 1. a. A stout military boot with a flared top that extends above the knee. b. A stout military boot that has an often studded sole, lacks laces, and extends to mid-calf.
Jackboots are tall, over-the-knee, black or brown leather boots with wide toes and chunky heels that are divided into cavalry and hobnailed varieties. These boots were originally made with waxed jack leather coated with pitch or tar for waterproofing. Popular in 17th and 18th century Europe, jackboots were later adopted as part of the military uniform of several nations through the 20th century.