A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
LAMINAR AIR FLOW: Streamlined airflow in which
the entire body of air within a designated space
moves with uniform velocity in one direction along
parallel flow lines.
LATENT HEAT: The heat required to change the
state of a substance as in changing water to steam.
LEGIONNAIRES' DISEASE: An acute bacterial pneumonia
caused by infection with Legionella pneumophila
and characterized by an influenza-like illness
followed within 1 week by high fever, chills,
muscle aches, and headache. Symptoms may include
dry cough, inflammation of the membrane covering
the lungs (pleurisy), and sometimes diarrhea.
LOAD: The amount of heat per unit time imposed
on a refrigerant system, or the required rate
of heat removal.
LOUVER: An assembly of sloping vanes intended
to permit air to pass through and to inhibit transfer
of water droplets.
LOW LIMIT: The minimum desirable, or safe, temperature;
the alarm given when the measured temperature
drops below this selected temperature.
LUMEN: The flux on one square foot of a sphere,
one foot in radius, with a light source of one
candle at the center that radiates uniformly in