Exam: TOEFL

Definition: A part of a plant, like a bud or a cutting, that helps it spread and grow into a new plant.

Example: The gardener used a propagule to grow new plants from the existing ones.

Definition: A type of alcohol that is used in various industrial and laboratory applications, often as a solvent or in the production of other chemicals.

Example: Propanol is commonly used as a solvent in the pharmaceutical industry.

Definition: To cause something to move in a particular direction, usually forward or onward.

Example: The engine will propel the boat across the water.

Definition: A substance that helps to push or drive something forward, often used in engines or rockets.

Example: The rocket used a powerful propellant to reach space.

Definition: A substance that is used to create thrust or force, often found in aerosol cans or rocket engines, to push out contents or propel objects forward.

Example: The rocket used a powerful propellant to reach outer space.

Definition: Able to push or drive something forward.

Example: The propellent force of the engine allowed the rocket to launch into space.

Definition: A substance used to create thrust in engines, often found in rockets and aerosol cans, that helps propel an object forward.

Example: The rocket used a powerful propellent to reach outer space.

Definition: A colorless gas that is a type of hydrocarbon, often used in the production of plastics and other chemicals.

Example: Propene is commonly used in the manufacturing of polypropylene, a widely used plastic.

Definition: A natural tendency or inclination to behave in a certain way or to prefer something.

Example: She has a propensity for helping others in need.

Definition: Suitable or appropriate for a particular situation; correct according to rules or conventions.

Example: It's important to wear proper attire for the formal event.

Definition: In a way that is correct, suitable, or appropriate for a particular situation.

Example: She completed the task proper, ensuring everything was done correctly.

Definition: A specific part of a religious service that changes depending on the feast or season.

Example: The priest read from the proper during the special service for Easter.

Definition: A type of protein found in blood serum that helps activate the immune system's complement pathway without needing antibodies.

Example: Properdin plays a crucial role in the immune response by enhancing the activation of the complement system.

Definition: The highest degree of being suitable, correct, or appropriate for a particular situation or purpose.

Example: She always knows the properest way to address a formal audience.