A gyre is another name for a swirling vortex. Ocean gyres are large swirling bodies of water that are often on the scale of a whole ocean basin or 1000 s of kilometers across (hundreds to thousands of miles across).
Lean meats are meats with a relatively low fat content. Skinless chicken and turkey and red meat, such as pork chops, with the fat trimmed off are examples of lean meat.
Lean red meats, including beef, pork and lamb, can play an important part in a healthy balanced diet as they have a high nutrient density. This means that they contain a wide variety of nutrients in a relatively small amount of food.Meat is a major source of protein.