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.
As with beef and chicken, the cut of the pork meat plays an important role in making a healthy selection. The leanest cut of pork is the pork tenderloin; however, other cuts such as pork chop, roasts, or leg (ham) are also good choices. Choose center cut or Canadian bacon over regular bacon strips. Lean pork is a good source of thiamine, phosphorous, niacin, and vitamin B-12, and is high in protein and low in fat. In fact, lean pork actually contains higher amounts of thiamin, niacin, and vitamins B-6 and B-12 than many other types of meat.