Definition: To give off light without heat, often in a way that is visible in the dark.

Example: The glow-in-the-dark stars on the ceiling luminesce at night, creating a magical atmosphere.

Definition: The process of producing light without heat, often caused by chemical reactions or other changes in matter.

Example: The glow of the fireflies is a beautiful example of luminescence in nature.

Definition: Having a shape that resembles a crescent or a half-moon.

Example: The lunate bone in the wrist is shaped like a crescent.

Definition: A small stone tool, often shaped like a crescent, that was used in ancient times, particularly during the Mesolithic Period, likely as an arrowhead.

Example: The archaeologist discovered a lunate in the excavation site, which provided insight into the tools used by ancient peoples.

Definition: A small moon or satellite that orbits a planet or another celestial body.

Example: The planet has a lunet that shines brightly in the night sky.

Definition: A crescent-shaped space or opening, often found in architecture, that can hold a window, sculpture, or mural.

Example: The artist painted a beautiful mural in the lunette above the entrance.

Definition: A chemical element with the symbol Lu and atomic number 71, known for its use in various applications including electronics and nuclear technology.

Example: Lutecium is used in some types of lasers and as a catalyst in chemical reactions.

Definition: A rare and silvery-white metallic element that is hard to separate from other similar elements, often used in nuclear technology.

Example: Lutetium is used in various applications, including as a catalyst in chemical reactions.

Definition: A material or substance used to seal or bond objects together, often in the context of dental or construction applications.

Example: The dentist applied a luting material to secure the crown in place.

Definition: A unit of measurement for light intensity, specifically the amount of light that falls on a surface area of one square meter.

Example: The room was brightly lit, measuring 500 lux on the light meter.

Definition: A type of enzyme that helps create double bonds in molecules by removing certain groups from a substance or by adding groups to double bonds without using water.

Example: Lyases play a crucial role in various biochemical reactions by modifying the structure of molecules.