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The word "parachute" comes from "para", meaning "against" or "counter" in Ancient Greek, and "chute", the French word for "fall". Some modern parachutes are classified as semi-rigid wings, which are maneuverable and can make a controlled descent to break on impact with the ground.

DrogueParachute

The word "parachute" comes from "para", meaning "against" or "counter" in Ancient Greek, and "chute",…

A weight of lead or other material attached to a line, and used to indicate a vertical direction; a plummet.

Plumb

A weight of lead or other material attached to a line, and used to indicate a vertical direction; a…

A piece of lead fastened to a line, and used to determine a perpendicular, and with a square, a horizontal line.

Plummet

A piece of lead fastened to a line, and used to determine a perpendicular, and with a square, a horizontal…