Definition: A metal spike used in climbing that is driven into rock or ice to hold a rope securely.

Example: The climber used a piton to secure his rope while ascending the steep cliff.

Definition: A type of evergreen shrub or tree that belongs to the genus Pittosporum, often found in warm regions and used for decoration or as hedges.

Example: The garden was filled with beautiful pittosporum plants that added a lush green look.

Definition: Having a playful and mischievous quality, often associated with small, magical creatures.

Example: The pixie-like girl danced around the garden, spreading joy and laughter.

Definition: A small, magical creature that is often playful and mischievous, similar to a fairy or sprite.

Example: The garden was filled with pixies dancing among the flowers.

Definition: An extinct type of fish that lived during the Silurian and Devonian periods, known for having bony plates that protected its head and sides, as well as having jaws and fins.

Example: Scientists have discovered fossils of placoderms that show their unique armored bodies.

Definition: Describing a type of scale that is flat and tooth-like, typically found on certain fish like sharks and rays.

Example: The shark's skin is covered in placoid scales that help reduce drag in the water.

Definition: Describing a growth pattern where something grows at an angle that is not straight up, often leaning to the side or almost horizontally.

Example: The plagiotropic branches of the tree spread out widely, creating a unique shape.

Definition: A serious disease that can spread quickly and cause many deaths, or a situation that causes a lot of trouble or annoyance.

Example: The city faced a plague that affected thousands of people.

Definition: To cause someone to suffer from a disease or to annoy someone repeatedly.

Example: The constant noise from the construction site plagued the residents for months.

Definition: Relating to the Native American tribes that lived in the Great Plains region of North America and their cultural practices.

Example: The Plains Indians had a rich tradition of storytelling and art.

Definition: A large area of flat land with few trees or hills.

Example: The vast plains stretched out before us, covered in golden grass.

Definition: A tiny organism that floats in water and is part of plankton, which includes various small plants and animals.

Example: The plankter is an essential part of the aquatic food chain, providing nourishment for larger marine animals.

Definition: Relating to organisms that drift in water, especially in oceans or lakes, and are unable to swim against currents.

Example: The planktic organisms play a crucial role in the aquatic food web.