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: To create raised lines or edges on a surface.

Example: The farmer decided to ridge the soil to improve drainage.

Definition: A long, narrow chain of hills or mountains, or a raised area on a surface.

Example: We hiked along the ridge to enjoy the beautiful view of the valley below.

Definition: To create or shape something with raised lines or edges.

Example: The carpenter decided to ridge the surface of the wood for better grip.

Definition: A line that marks the highest point of a mountain or hill, often where two slopes meet.

Example: The hikers followed the ridgeline to reach the summit of the mountain.

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.

Definition: A set of spiral grooves cut into the inside of a gun barrel that helps bullets spin for better accuracy when fired.

Example: The gunsmith carefully examined the rifling to ensure it was properly cut for optimal performance.

Definition: Not able to bend or change; very strict and not allowing for any flexibility.

Example: The rules were so rigid that no one could make any changes to the project.