Definition: A type of extinct flying reptile that lived during the time of the dinosaurs, known for its large wings made of skin stretched over a long finger.

Example: The pterosaur soared through the sky, its wings casting a shadow over the land below.

Definition: A growth of tissue on the eye that can block vision, usually starting from the inner corner and spreading over the clear front part of the eye.

Example: The doctor diagnosed her with a pterygium that was affecting her eyesight.

Definition: Relating to a specific area of the skull, particularly near the sphenoid bone, or resembling a wing.

Example: The pterygoid muscles are important for jaw movement.

Definition: A structure that extends from the sphenoid bone in the skull, often related to muscles or nerves.

Example: The pterygoid muscles are important for chewing and moving the jaw.

Definition: A type of chemical compound that is produced by bacteria during the decay of organic matter.

Example: The presence of ptomain in the spoiled food indicated that it was unsafe to eat.

Definition: A type of organic compound that is created when bacteria break down proteins, often associated with unpleasant smells and sometimes harmful effects.

Example: The food was contaminated with ptomaine, leading to food poisoning among several guests.

Definition: A condition where an organ or part of the body, especially the upper eyelid, droops or falls down due to weakness or paralysis.

Example: The doctor explained that ptosis can affect vision if the eyelid droops too much.

Definition: Relating to a condition where a part of the body, especially the eyelid, droops or falls down.

Example: The doctor explained that her eyelid was ptotic, which could affect her vision.

Definition: A type of enzyme found in saliva that helps break down starches into sugars.

Example: Ptyalin plays an important role in the digestion of carbohydrates starting in the mouth.

Definition: A condition where there is an unusually large amount of saliva produced in the mouth.

Example: The patient was diagnosed with ptyalism after experiencing constant drooling.

Definition: Relating to the period of physical development during which a person becomes capable of sexual reproduction.

Example: During the puberal stage, many teenagers experience significant changes in their bodies.