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.
Meat can be considered extra lean if it has less than 5 gm of fat, 2 gm of saturated fat and 95 milligrams of cholesterol per 3.5 ounce serving. Here are some tips for picking out certain cuts of meat that are considered lean or extra lean. 3.5 ounce (100 grams) serving of meat needs to have less than 10 gm of total fat, 4.5 gm of saturated fat and 95 milligrams of cholesterol in order to be considered lean, according to the United States Department of Agriculture (USDA).