Lv meaning : 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. A distance relative to a given reference elevation. Degree or amount. Achievement or qualification. Distance from the root node of a tree structure. One of several discrete segments of a game, generally increasing in difficulty and representing different locations in the game world. A numeric value that quantifies a character's experience and power. A floor of a multi-storey building. An area of almost perfectly flat land. A school grade or year. Initialism of liquid volume. Initialism of local volume. Initialism of logical volume. Initialism of low voltage. Initialism of low volume. Initialism of luncheon voucher.