ECO

Noun

 * 1)   a NASA term for when rocket engines are shut down
 * 2)   a type of black hole replacement, to avoid having gravitational singularities

Related terms

 * main engine cut-off
 * sustainer engine cutoff
 * secondary engine cut-off
 * booster engine cutoff


 * magnetospheric eternally collapsing object a different type of black hole replacement, that inspired the formulation of ECOs