Definition: A type of kidney organ found in some vertebrate embryos that is the first of three pairs of renal organs, which disappears early in development for higher vertebrates but works as a kidney in simpler species like lampreys.

Example: The pronephros is an important structure during the early stages of development in certain vertebrates.

Definition: A pointed part that sticks out from something, often used to hold or lift things, like the tines of a fork or the points of a pitchfork.

Example: He used a fork with three prongs to eat his dinner.

Definition: To pierce something using a sharp, pointed part that sticks out.

Example: He used a fork to prong the meat before cooking it.

Definition: The single nucleus found in a male or female gamete, such as an egg or sperm, before it merges with another gamete during fertilization.

Example: The pronucleus is essential for the process of fertilization, as it contains the genetic material from the gamete.

Definition: The process of increasing or spreading something, such as plants or waves, to a larger area or greater number.

Example: The propagation of sound waves can be affected by the medium through which they travel.

Definition: Relating to the process of spreading or reproducing something, especially in a biological or agricultural context.

Example: The propagative methods used in gardening can help plants grow more efficiently.

Definition: A person or device that helps to spread or grow plants, seeds, or information.

Example: The gardener used a propagator to start the seedlings indoors before planting them outside.

Definition: A colorless gas that is used as a fuel, commonly found in natural gas and petroleum.

Example: We use propane to heat our home during the winter.

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.