Definition: A person or thing that makes something last longer or extends its duration.

Example: The prolonger of the meeting was necessary to discuss all the important topics.

Definition: A radioactive metal that is part of the rare-earth elements, created from uranium or neodymium, and has various isotopes used for producing beta rays.

Example: Promethium is used in some types of batteries and luminous paints.

Definition: Having the quality of encouraging or supporting something to grow or develop.

Example: The promotive policies of the government helped small businesses thrive.

Definition: Relating to the first stage of kidney development in some vertebrates, known as the pronephros.

Example: The pronephric stage is crucial in the early development of the kidney in certain animals.

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: Describing something that has a certain number of pointed parts or extensions, often used to refer to tools or objects with multiple points.

Example: The fork was pronged, making it easy to pick up food.

Definition: The upper part of the first segment of an insect's thorax, which is located just behind the head.

Example: The entomologist examined the pronotum to identify the species of the insect.

Definition: Relating to the pronucleus, which is the nucleus of a sperm or egg cell before they fuse during fertilization.

Example: The pronuclear stage is crucial in the process of fertilization.

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: Able to resist or withstand something, often used in combination with other words to describe specific types of resistance, such as against water or fire.

Example: The fireproof material kept the building safe during the blaze.

Definition: To undergo a process of fermentation or rising, especially in baking, where dough becomes light and airy.

Example: The dough needs to proof for at least an hour before baking.

Definition: Evidence or information that shows something is true or valid.

Example: She provided proof of her identity by showing her passport.

Definition: To make something resistant to a particular condition or to prepare something for use, often by treating it in a specific way.

Example: The company decided to proof the fabric to prevent it from shrinking in the wash.