Definition: A dark gray or black mineral made of copper sulfide, which is an important source of copper.

Example: Chalcocite is often found in copper mines as a valuable ore.

Definition: A type of element found in group 16 of the periodic table, which includes oxygen, sulfur, selenium, tellurium, and polonium.

Example: Oxygen is a well-known chalcogen that is essential for life.

Definition: A type of chemical compound that consists of a chalcogen element combined with a more electropositive element, typically forming a binary compound.

Example: The researchers studied various chalcogenides for their potential use in solar cells.

Definition: A yellow mineral made of copper and iron sulfide, which is a significant source of copper.

Example: Chalcopyrite is often found in copper mines as a valuable ore.

Definition: Having a texture or appearance similar to chalk, often white or pale in color.

Example: The walls were painted in a chalky white that brightened the room.

Definition: A type of substance produced by body tissues that can stop cell division in those tissues.

Example: Chalones play a role in regulating cell growth and division in various tissues.

Definition: Describing something that contains iron or has a taste of iron, often used for mineral springs or water.

Example: The chalybeate water is known for its health benefits due to its iron content.

Definition: A type of water or medicine that contains iron, often used for its health benefits.

Example: The spa is famous for its chalybeate springs, which are believed to improve health.

Definition: A part of a gun where the bullet is loaded before firing.

Example: The gunsmith inspected the chambering to ensure it was functioning properly.

Definition: To place or store something in a chamber, which is a closed space or room.

Example: The technician is chambering the new equipment for testing.

Definition: A hard, red sore that appears at the beginning stage of syphilis or other infections.

Example: The doctor examined the chancre to determine if it was a sign of syphilis.

Definition: A type of sexually transmitted infection that causes painful sores in the genital area, caused by a specific bacterium.

Example: The doctor diagnosed him with chancroid after examining the sores.