Definition: A pipe or channel that carries water to a water wheel or turbine, often used to control the flow of water.

Example: The engineers installed a new penstock to improve the efficiency of the hydroelectric plant.

Definition: Describes something that is confined or restricted, often used to refer to being trapped or enclosed in a space.

Example: The pent animals were kept in a small enclosure away from the public.

Definition: To confine or restrict something, often used in the context of emotions or thoughts that are held back.

Example: She felt pent up after being stuck in the house all week.

Definition: A collection or set of five items or elements.

Example: The pentad of senses includes sight, hearing, touch, taste, and smell.

Definition: A shape with five sides and five angles, or a specific building in Washington, D.C. that houses the U.S. Department of Defense.

Example: The Pentagon is an important symbol of the U.S. military.

Definition: This word describes something that has five sides and five angles, like a shape or figure.

Example: The architect designed a pentagonal building that stood out in the city.

Definition: Describing a shape that has five faces or sides.

Example: The architect designed a pentahedral structure for the new building.

Definition: A three-dimensional shape that has five flat surfaces or faces.

Example: The architect designed a unique building shaped like a pentahedron.

Definition: Describing something that has five similar parts or components, often used in relation to flowers with five petals or other structures.

Example: The pentamerous flower of the geranium has five distinct petals.

Definition: A type of medicine that helps to treat certain infections, especially those caused by tiny organisms like protozoa, and is used to prevent a specific type of pneumonia in people with weakened immune systems.

Example: The doctor prescribed pentamidine to help prevent pneumonia in patients with AIDS.

Definition: Pentane is a type of hydrocarbon that consists of five carbon atoms and twelve hydrogen atoms. It is colorless and flammable, and is often found in petroleum. It is used in various applications, including as a solvent.

Example: Pentane is commonly used in laboratories as a solvent for chemical reactions.