Definition: A white crystalline substance derived from certain plants, used mainly as an insecticide to control pests in gardens and agriculture.

Example: Farmers often use rotenone to protect their crops from harmful insects.

Definition: A tiny aquatic organism that belongs to a group called Rotifera, known for having a wheel-like structure with tiny hairs at one end that helps it move and feed.

Example: Under the microscope, we could see the rotifer swimming gracefully in the water.

Definition: The state or quality of being decayed or decomposed, often resulting in a foul smell or appearance.

Example: The rottenness of the fruit made it inedible.

Definition: The state of being round or plump in shape.

Example: The rotundity of the pumpkin made it perfect for carving.

Definition: To make something have a rough surface or texture.

Example: The carpenter decided to roughen the wood before applying the finish.

Definition: The process of making a number simpler by increasing or decreasing it to the nearest whole number or specified decimal place.

Example: In math class, we learned about rounding numbers to make calculations easier.

Definition: To make something round or to change a number to the nearest whole number or specified decimal place.

Example: She is rounding the edges of the table to make it safer for children.

Definition: A small circular shape or object.

Example: The artist painted a roundlet in the center of the canvas.

Definition: The quality or state of being shaped like a circle or sphere.

Example: The roundness of the ball made it easy to roll.

Definition: A type of long, cylindrical worm that is unsegmented and often found in the intestines of animals and humans, causing various health issues.

Example: The veterinarian diagnosed the dog with a roundworm infection after noticing its symptoms.

Definition: A disease that affects birds, especially poultry and pigeons, causing inflammation and discharge from the mouth and eyes.

Example: The farmer was worried about the outbreak of roup in his flock of chickens.