Definition: A three-dimensional shape that is formed by rotating a parabola around its axis, resulting in a surface that can be described by parabolic and elliptical sections.

Example: The satellite dish is shaped like a paraboloid to focus signals onto the receiver.

Definition: Having a shape that resembles a paraboloid, which is a three-dimensional surface formed by rotating a parabola around its axis.

Example: The satellite dish has a paraboloidal shape that helps focus signals.

Definition: To fall or descend using a device that slows down the fall, typically made of fabric and designed to open in the air.

Example: The skydiver decided to parachute from the plane to experience the thrill of freefall.

Definition: A device that slows down the fall of a person or object from the sky, usually made of a large fabric canopy that opens up to create drag in the air.

Example: The skydiver pulled the cord to open his parachute and slow his descent.

Definition: To drop something from the air using a parachute, typically supplies or people.

Example: The military decided to parachute the supplies into the remote area.

Definition: A waxy solid substance made from hydrocarbons, commonly used to make candles, wax paper, and other products.

Example: The candle was made of paraffin, which allowed it to burn slowly and evenly.

Definition: To cover or fill something with a waxy substance that is often used for sealing or preserving.

Example: The candles were paraffined to make them last longer.

Definition: Relating to a type of hydrocarbon that is saturated and has a straight or branched chain structure, commonly found in substances like paraffin wax.

Example: The paraffinic compounds in the oil are less reactive than aromatic compounds.

Definition: A type of flexible parachute that is shaped like a wing and is used for activities like kiting and paragliding.

Example: The parafoil soared gracefully through the sky as the wind caught its surface.

Definition: A type of polymer that is similar to paraformaldehyde, often used in various chemical applications.

Example: The laboratory used paraform for its experiments with formaldehyde derivatives.

Definition: The process by which different minerals form together and influence each other's growth and characteristics.

Example: The study of paragenesis helps geologists understand the history of mineral formation in a rock.

Definition: A clear, colorless liquid made from acetaldehyde, used mainly as a solvent and for its calming effects.

Example: The doctor prescribed paraldehyde to help the patient relax during the procedure.

Definition: A visual effect where an object appears to change position or direction when viewed from different angles or locations.

Example: The parallax effect is used in photography to create a sense of depth.