encyclopedia

DERAIL

1.Pronounced with emphasis on the “De” portion. A safety device which will cause an uncontrolled movement to derail before moving to a place where a collision with other equipment could occur. Often linked to signals. 2. To run off the…

DERAILMENT

Accidental occurrence where train wheels leave the rail. Can be minor, with only one wheel down on the ties, or a catastrophic wreck of many cars and locomotives.

DERIVATIVE

A financial instrument, traded on or off an exchange, the price of which is directly dependent upon (i.e., “derived from”) the value of one or more underlying securities, equity indices, debt instruments, commodities, other derivative instruments, or any agreed upon…