Definition: The state or quality of having small holes or spaces that allow air or liquid to pass through.

Example: The porousness of the sponge makes it very absorbent.

Definition: A type of rock that has large visible crystals, usually feldspar, set in a finer-grained background.

Example: The ancient Romans used porphyry for their sculptures and buildings due to its durability and beauty.

Definition: A type of small, social marine mammal that is similar to a dolphin, known for its blunt snout and triangular dorsal fin.

Example: The porpoise swam gracefully alongside the boat, delighting the passengers.

Definition: To leap or dive in a way similar to how a porpoise moves in the water, often rising and falling repeatedly.

Example: The children loved to porpoise in the waves at the beach.

Definition: A type of plant that has thick, fleshy leaves and colorful flowers, often found in tropical areas and known for blooming in sunlight.

Example: The garden was filled with vibrant portulaca flowers that opened up in the morning sun.

Definition: Referring to the time period or conditions that happen after a glacial period has ended.

Example: The postglacial landscape is characterized by the recovery of vegetation and wildlife.

Definition: A hole that is dug in the ground to support a fence post or similar structure.

Example: The workers dug a posthole to install the new fence.

Definition: Relating to rivers or the characteristics of rivers.

Example: The potamic ecosystem is vital for maintaining biodiversity in the region.

Definition: A type of chemical compound that contains potassium, often used in fertilizers and other agricultural products.

Example: Farmers often use potash to improve soil fertility and crop yields.

Definition: Describes a plant that has become too big for its pot, causing its roots to become tangled or crowded.

Example: The potbound plant struggled to grow because its roots had no space left to expand.

Definition: A type of plant that belongs to the genus Potentilla, which includes various herbs and shrubs found mainly in the northern temperate regions. These plants typically have compound leaves and produce flowers that can be yellow, white, or red.

Example: The garden was filled with beautiful potentilla plants that bloomed in vibrant colors.