Exam: TOEFL

Definition: A professional who designs, creates, and fits artificial limbs or other prosthetic devices for people who have lost limbs or have disabilities.

Example: The prosthetist helped the patient find the right artificial leg to improve mobility.

Definition: A field of dentistry focused on creating and fitting artificial devices to replace missing teeth and restore the function and appearance of the mouth.

Example: After losing several teeth, she decided to consult a specialist in prosthodontics for a dental implant.

Definition: A dental specialist who focuses on designing and fitting artificial teeth and other dental prostheses to improve a person's smile and function.

Example: After losing several teeth, she decided to visit a prosthodontist for a dental implant.

Definition: Lying flat on the ground, often face down, usually in a position of submission or weakness.

Example: After the long race, he felt so exhausted that he had to lie prostrate on the grass.

Definition: To cause someone or something to lie flat on the ground, often in a position of submission or weakness.

Example: The strong winds prostrated the young trees in the park.

Definition: The act of lying flat on the ground, often as a sign of submission or exhaustion, or the state of being extremely weak or tired.

Example: After the long hike, I fell into a state of prostration and couldn't move for a while.

Definition: A rare and highly radioactive metal that is similar to uranium and has several isotopes, with the most common being protactinium-231, which has a long half-life.

Example: Protactinium is used in some types of nuclear research due to its radioactive properties.

Definition: The main character in a story, play, or other literary work, often facing challenges and making important decisions.

Example: In the novel, the protagonist struggles to overcome obstacles and find their true identity.

Definition: A type of protein found in the seminal fluid of salmon that can dissolve in water and reacts with acids and metals.

Example: Protamin is used in medicine to reverse the effects of heparin during surgery.

Definition: A type of simple protein that is found in fish and is soluble in water. It is used in medicine to help with insulin formulations and to counteract the effects of certain blood thinners.

Example: Protamine is often used in hospitals to reverse the effects of heparin after surgery.

Definition: A type of enzyme that helps break down proteins into smaller parts, like peptides or amino acids.

Example: Proteases play a crucial role in digestion by breaking down the proteins we eat.