Definition: A type of reptile that belongs to a group including dinosaurs, pterosaurs, and crocodiles.

Example: The archosaur is an important part of the evolutionary history of reptiles.

Definition: A member of a group of reptiles that includes dinosaurs, crocodiles, and birds, characterized by certain skeletal features.

Example: The archosaurian lineage includes some of the most fascinating creatures in Earth's history.

Definition: Shaped like a curve or arch.

Example: The bridge has an arciform design that adds elegance to the landscape.

Definition: A mathematical function that gives the angle whose sine is a given number. It is the inverse of the sine function.

Example: To find the angle, you can use the arcsine of the sine value.

Definition: A mathematical function that gives the angle whose tangent is a given number. It is the inverse of the tangent function.

Example: To find the angle, you can use the arctangent of the ratio of the opposite side to the adjacent side in a right triangle.

Definition: Relating to the North Pole or the regions around it, characterized by extremely cold temperatures.

Example: The arctic climate is known for its long, harsh winters and short summers.

Definition: A type of warm, waterproof footwear designed to protect the feet from cold and wet conditions, often reaching to the ankle or higher.

Example: She wore her arctics to keep her feet dry in the snow.

Definition: Having a shape that is curved like a bow.

Example: The arcuate design of the bridge makes it both beautiful and functional.

Definition: A term used to describe various arc-shaped formations or structures, often related to clouds, cholesterol deposits, pollen grains, or insect anatomy.

Example: The arcus cloud appeared ominously on the horizon, signaling a storm was approaching.

Definition: A measurement used for dry goods in some Middle Eastern countries, which is equal to 198 liters in Egypt but can differ in other places.

Example: The farmer sold his grain by the ardeb, ensuring he had the correct amount for his customers.

Definition: In a way that requires a lot of effort and hard work.

Example: She worked arduously to complete the project on time.