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.
The healthiest dairy products and meat are low in calories, fat and cholesterol. Low-fat dairy products include skim milk, low-fat cheese and fat-free yogurt. Examples of lean meats include chicken, turkey, eggs, fish, seafood, pork tenderloin, ground beef that is more than 90 percent fat-free, buffalo and game meat.