Definition: A type of curve on the surface of a sphere that crosses all meridians at the same angle, often used in navigation.

Example: Sailors often use a loxodrome to plot their course across the ocean.

Definition: A type of enzyme found in certain organisms that helps produce light by facilitating a chemical reaction involving luciferin and ATP.

Example: Researchers are studying luciferase to understand how bioluminescent organisms create light.

Definition: A chemical compound found in certain living organisms that emits light when it reacts with oxygen.

Example: Fireflies use luciferin to create their beautiful glow during the night.

Definition: A type of sail that is shaped like a four-sided figure, which is attached to a yard that hangs at an angle on the mast and does not have a boom.

Example: The sailor adjusted the lugsail to catch the wind more effectively.

Definition: A structure that allows smoke and gases to escape from a fireplace or stove, typically extending above the roof of a building.

Example: The old house had a tall lum that could be seen from miles away.

Definition: A unit of currency in Armenia that is equal to one hundredth of an Armenian dram, or a term used to describe the brightness of an image, distinguishing it from color intensity.

Example: The price of the book is 500 luma, which is a small amount in Armenian currency.

Definition: A unit of measurement for the amount of light emitted by a source, or the open space within a tubular structure in biology.

Example: The lumen is used to measure the brightness of light bulbs.

Definition: A device that holds and provides light, often used in homes and buildings to illuminate spaces.

Example: The new luminaire in the living room brightened up the entire area.

Definition: Relating to the inner open space of a tubular structure, such as a blood vessel or a part of the body.

Example: The doctor explained how the luminal area of the artery can become narrowed due to plaque buildup.

Definition: A type of medication used to calm or sedate a person, often used in medical settings.

Example: The doctor prescribed a luminal to help the patient relax before the procedure.

Definition: The brightness or amount of light that comes from a surface or source.

Example: The luminance of the screen was adjusted to reduce glare.