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.
Pork tenderloin is one of the healthiest cuts of pork. This lean meat provides just 122 calories and only three grams of fat per three-ounce serving. And you'll benefit from 22 grams of protein when you enjoy this cut of meat. But there are different kinds of pork and different ways to prepare it.