Definition: A type of chemical compound made up of four connected pyrrole rings, often found in natural pigments like chlorophyll.

Example: Chlorophyll is a tetrapyrrole that plays a crucial role in photosynthesis.

Definition: A type of spore that is produced in groups of four, typically found in certain algae, especially red algae, and formed through a process called meiosis.

Example: The tetraspores released by the algae can develop into new organisms.

Definition: This term describes an element or compound that can form four bonds with other atoms or groups.

Example: Carbon is a tetravalent element, meaning it can bond with four other atoms.

Definition: A type of chemical compound that contains a specific group of atoms known as tetrazole, often used in scientific tests to measure metabolic activity in cells.

Example: The researchers used tetrazolium to assess the viability of the cells in their experiment.

Definition: A strong poison that affects the nervous system, commonly found in puffer fish and some newts, which prevents nerves from sending signals by blocking sodium ions.

Example: Tetrodotoxin is extremely dangerous and can cause paralysis if ingested.

Definition: A type of simple sugar that has four carbon atoms in its structure.

Example: Tetrose is a rare sugar that can be found in some plants.

Definition: A type of chemical compound that contains four oxygen atoms in its molecular structure.

Example: Ruthenium tetroxid is used in various chemical reactions due to its unique properties.

Definition: A chemical substance that has four oxygen atoms in each molecule.

Example: Dinitrogen tetroxide is a common example of a tetroxide used in rocket propellants.

Definition: A yellow crystalline substance that is used as an explosive, particularly in detonators.

Example: The military used tetryl as a reliable detonator in their explosives.

Definition: Relating to the way a surface feels or looks, especially in terms of its structure or quality.

Example: The artist used a variety of materials to create a rich textural effect in her painting.