Definition: A term used to describe a floral structure that includes the outer parts of a flower, such as petals and sepals, or a geometric concept referring to a full circle or round angle.

Example: The botanist explained that the perigon is essential for understanding the flower's structure.

Definition: Describing something that happens or appears at regular intervals or in repeated cycles.

Example: The periodic table organizes elements based on their atomic number and properties.

Definition: The quality of occurring at regular intervals or the state of being repeated over time.

Example: The periodicity of the seasons affects many aspects of nature.

Definition: Relating to the bones that are located around the inner ear.

Example: The surgeon specialized in periotic structures to improve hearing.

Definition: A bone that is part of the structure of the inner ear, made up of several fused bones.

Example: The periotic bone plays a crucial role in the anatomy of the inner ear.

Definition: A tube-shaped device that uses mirrors and lenses to allow someone to see things that are not in their direct line of sight.

Example: The submarine used a periscope to see above the water without being detected.

Definition: Related to devices that allow you to see things from a different angle or perspective, often used in submarines or other situations where direct sight is blocked.

Example: The periscopic lens allowed the submarine crew to see above the water's surface without being detected.

Definition: A small, flask-shaped structure found in certain fungi that holds spores.

Example: The scientist observed the perithecium under the microscope to study its spores.

Definition: Describing organisms that have a band of hair-like structures (cilia) around their body or mouth, often seen in certain types of protozoans and bacteria.

Example: The peritrichous protozoan uses its cilia to move and feed.

Definition: A type of volcanic glass that expands when heated, used in construction and gardening as a lightweight material.

Example: Perlite is often added to potting soil to improve drainage and aeration.

Definition: Describing something that is similar to or has characteristics of a type of volcanic glass called perlite, which is light and has a pearly appearance.

Example: The perlitic rock was lightweight and had a shiny, pearl-like surface.