pinch point

Noun

 * 1)  A point in between moving and stationary parts of a machine where an individual's body part may become caught, leading to injury
 * 2)  The level of inventories of a commodity or product below which consumers become concerned about security of supply
 * 3)  Cuspidal point, a type of singular point on an algebraic surface
 * 4) A kerb extension, a traffic calming measure consisting of an angled narrowing of the roadway
 * 5) A bottleneck, part of a process that is too slow and causes a delay.