Definition: The level or amount of poison in a substance that can cause harm to living things.

Example: The toxicity of the chemical was tested to ensure it was safe for use.

Definition: A measure of how well a material can allow radiation or water to pass through it.

Example: The transmissivity of the aquifer was tested to determine its ability to supply water.

Definition: Able to let light pass through so that you can see things clearly behind it; easy to see or understand.

Example: The glass is transparent, allowing us to see the beautiful garden outside.

Definition: Relating to or extending across the polar regions of the Earth.

Example: The transpolar route is often used by ships navigating through icy waters.

Definition: Waste material or unwanted items that are discarded.

Example: Please take out the trash before the guests arrive.

Definition: To throw something away or discard it; to get rid of something that is no longer wanted or needed.

Example: He decided to trash the old magazines that were taking up space.

Definition: Describing an area that does not have any trees.

Example: The landscape was completely treeless, stretching for miles under the bright sun.

Definition: A chemical compound made from tin that is used to kill harmful organisms, especially in marine environments.

Example: Tributyltin is often found in antifouling paints to prevent the growth of barnacles on ships.

Definition: A chemical substance used to kill unwanted plants, especially weeds, in agriculture.

Example: Farmers often use trifluralin to manage weed growth in their fields.

Definition: A type of chemical compound that has three halogen atoms instead of three hydrogen atoms in a methane molecule. These compounds can form when chlorine is added to water to kill germs, especially when organic materials are present.

Example: Trihalomethanes can be found in drinking water that has been treated with chlorine.

Definition: Relating to the regions of the Earth near the equator, characterized by warm temperatures and high humidity.

Example: The tropic climate is known for its lush vegetation and diverse wildlife.

Definition: A line of latitude on the Earth, located about 23.5 degrees north or south of the equator, where the sun is directly overhead at noon during the solstices.

Example: The tropic of Cancer is one of the two tropics that mark the boundaries of the tropical zone.