Dictionary

A variable that is not directly measured but is inferred by means of a mathematical model from one or more directly observed variables.

A vehicle for transporting objects into space, usually a rocket.

One of the four chambers of the heart of humans and other mammals, which receives oxygenated blood from the left atrium and pumps it out through the aorta.

A tool for finding whether a surface is level, or for creating a horizontal or vertical line of reference.

Example: Hand me the level so I can tell if this is correctly installed.

A distance relative to a given reference elevation.

Example: By the end of the day, we'd dug down to the level of the old basement floor.

Degree or amount.

Example: The sound level is much too high; this hurts my ears.   We've reached a new level of success.

Achievement or qualification.

Example: She achieved a high level of distinction.

Initialism of liquid volume.

Initialism of local volume.

Initialism of logical volume.

Initialism of low voltage.