Definition: The state of having two curved surfaces that are both concave, resembling the shape of a biconcave lens or certain types of cells.

Example: The biconcavity of the lens allows it to focus light more effectively.

Definition: Describing a situation where two conditions must both be true or both be false for a statement to hold true.

Example: In logic, a biconditional statement is true if both parts are either true or false.

Definition: A type of logical statement that is true when both parts are either true or false at the same time.

Example: In mathematics, a biconditional statement is often used to define equivalence between two conditions.

Definition: Having a curved shape that bulges outward on both sides.

Example: The lens in my glasses is biconvex, helping to correct my vision.

Definition: Describing something that has two points or peaks, like a shape or a tooth.

Example: The dentist explained that a bicuspid tooth is used for grinding food.

Definition: A type of tooth in humans that has two points or cusps, commonly known as a premolar, used for grinding food.

Example: The dentist explained that the bicuspid is important for chewing.

Definition: Relating to a structure that has two cycles or rings, often used in chemistry and botany to describe certain types of molecules or flower arrangements.

Example: The bicyclic compound was essential for the chemical reaction we were studying.

Definition: Describing a sound or speech sound that is produced using both the upper and lower teeth.

Example: The letter 'f' is bidental because it is made with both the upper and lower teeth touching the lip.

Definition: Relating to something that can move or operate in two opposite directions.

Example: The new software allows for bidirectional communication between devices.

Definition: In a way that involves two opposite directions or movements.

Example: The data can be transmitted bidirectionally between the two devices.

Definition: Describing something that happens every two years or lasts for two years.

Example: The city hosts a biennial art festival that attracts artists from around the world.

Definition: An event or plant that happens or grows every two years.

Example: The art exhibition is a biennial event that showcases new artists.

Definition: Describing something that has two faces or surfaces, often used to refer to tools or objects that are worked on both sides for better functionality.

Example: The archaeologist discovered a bifacial tool that was sharp on both edges, indicating advanced craftsmanship.