Definition: A man-made medicine that helps fight certain viral infections by stopping the virus from making copies of itself.

Example: The doctor prescribed ribavirin to help treat the patient's viral infection.

Definition: Describing something that does not have ribs or rib-like structures.

Example: The ribless design of the chair made it lightweight and easy to move.

Definition: A type of vitamin that is important for growth and metabolism, found in foods like milk, eggs, and green vegetables.

Example: Riboflavin is essential for maintaining healthy skin and eyes.

Definition: A toxic protein that comes from the seeds of the castor bean plant, often used in scientific research.

Example: Ricin is highly dangerous and can be lethal if ingested or inhaled.

Definition: Describing something that is weak, unstable, or likely to collapse, often due to poor construction or age.

Example: The ricketier structure swayed dangerously in the wind, making everyone nervous.

Definition: A health condition caused by not having enough vitamin D or calcium, leading to weak bones and poor growth, especially in children.

Example: Rickets can lead to serious health problems if not treated early.

Definition: A type of very small bacteria that are carried by parasites like ticks and fleas, which can cause diseases such as typhus and Rocky Mountain spotted fever in humans.

Example: Rickettsia are known to be transmitted by ticks and can lead to serious illnesses.

Definition: Connected to a type of bacteria known as rickettsias, which can cause diseases in humans and animals.

Example: The doctor diagnosed the patient with a rickettsial infection after reviewing the symptoms.

Definition: A type of antibiotic used to treat bacterial infections, especially tuberculosis.

Example: The doctor prescribed rifampicin to help treat the patient's tuberculosis.

Definition: A type of antibiotic that is used to treat infections, especially tuberculosis, by stopping bacteria from making RNA.

Example: The doctor prescribed rifampin to help treat the patient's tuberculosis.