Definition: Having a shape that resembles an urn, typically used to describe certain types of flowers or plant structures.

Example: The botanist described the flower as urceolate due to its unique urn-like shape.

Definition: A small, spiny sea creature or a playful, mischievous child, often seen as poor or ragged.

Example: The children played in the park like little urchins, laughing and running around.

Definition: A stage in the life cycle of certain fungi, particularly rusts, that occurs in summer and comes before the winter stage.

Example: The uredo stage of the rust fungus is crucial for its reproduction.

Definition: Relating to the excretion of urea as the main way to remove nitrogenous waste from the body.

Example: Many mammals are ureotelic, meaning they primarily excrete urea instead of ammonia.

Definition: A type of notochord that is found only in the tail region of certain marine animals known as urochordates.

Example: The urochord is an important feature in the development of urochordates, helping to support their bodies.

Definition: A type of amphibian that includes creatures like salamanders and newts, which keep their tails throughout their lives.

Example: The urodele is known for its ability to regenerate lost limbs.

Definition: The fleshy and bony part at the back end of a bird's body that holds the tail feathers.

Example: The uropygium is an important part of a bird's anatomy, as it supports the tail feathers.

Definition: A term used to refer to either of the two constellations named after bears, Ursa Major and Ursa Minor.

Example: In the night sky, you can find Ursa Major, which contains the Big Dipper.

Definition: A member of the bear family, which includes various species of bears.

Example: The grizzly bear is an example of an ursid found in North America.

Definition: Having the shape or form of a bear.

Example: The ancient sculpture was described as ursiform due to its bear-like appearance.