Initially designed to strengthen tanks, a reactive armour, that explodes when hit by either kinetic energy or high explosive antitank (HEAT) projectiles, disrupting the round, and degrading its penetration. Explosive reactive armour is most effective against HEAT rounds.

The new Russian Kontakt-5 ERA is not completely destroyed when hit - it still functions as armour after exploding.

Anti-tank weapons work by piercing the armour and exploding inside, thus killing the crew.

Explosive reactive armour counteracts the force of the explosion by creating another explosion on itself. Against shaped charged missiles, this type of armour really comes into it's own.

The design was patented by Manfred Held in the 1970's.
ERA will save the lives of the crew and allow the tank to fight another day.
by Gumba Gumba April 13, 2004
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What can happen when you basically neglect you child's social/emotional needs. They develop this mental illness and become extremely insecure, immature and problematic, and get a really low self-esteem. If not treated, they can self-harm and become manchildren with an inferiority complex and constantly tantrum like a severely autistic child, and the disorder becomes very hard or just impossible to cure.
I regret neglecting my daughter. She developed this "reactive attachment disorder" and she had to be put in foster care because she went crazy.
by PorcupineCanadian December 30, 2016
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a term used by pit bull owners to try to hid the fact their monster will kill any other dog it sees
This good boi is looking for his forever home! Six other families have returned him to the shelter. Angel is a sweet lubbie pibble who is dog reactive so he'll do best in a house with no children or other pets.
by Arcxjo February 26, 2021
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Reactive index is the correlation of sensory stimuli experienced and its corresponding physiological and physical response or reaction, by any living being. Reactive index will be used to understand the relationship between brain, body, and their functions, thus assess, predict, and alter abilities and behavior exhibited by living beings.
We are looking for people with high Reactive Index.
by jignesh talasila December 20, 2017
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