Retrograde extrapolation is the mathematical process by which someone's blood alcohol concentration at the time of driving is estimated by projecting backwards from a later chemical test.

Fusiform, elongated; head conical, the vertex being prolonged to an acute point projecting forward and anal segment also prolonged to a point projecting backwards.

But viewed in a convex mirror mounted in a strategic position, the rug becomes a convincing image (albeit in reverse) of Pollock's painting, like a slide projected backwards.

Flowers grow on a long stem above the leaves and have five pointed yellow sepals and five yellow petals with long spurs projecting backwards between the sepals.

How can the second stimuli be 'projected backwards in time', such that it can affect the perception of things that occurred before the second stimulus was even administered?

They are large (up to 3 cm), fast-flying bees, distinguished from the closely related genus Epicharis by the absence of long, whip-like setae that project backwards from just behind the eyes.

They have long antennae with 10 or more bead-like segments projecting forward from the head, and a pair of cerci projecting backwards from the last of the 11 abdominal somites.

"Imagine the arrows projected backwards," Nemoto said.

When the instruments were stripped away, a single bar remained, projecting backwards like a tiller handle.

They are distinguished from the closely related genus Centris by two sets of three long, whip-like setae that project backwards from just behind the eyes.