The lymphatic system is a vital part of the immune system, along with the thymus, bone marrow, spleen, tonsils, appendix, and Peyer patches in the small intestine. The lymphatic system is a network of lymph nodes connected by lymphatic vessels. This system transports lymph throughout the body. Lymph is formed from fluid that seeps through the thin walls of capillaries into the body's tissues. This fluid contains oxygen, proteins, and other nutrients that nourish the tissues.
Noun[edit] piazza â(plural piazzas or piazze) 1  A public square, especially in an Italian city. ( US dialects, chiefly New England, dated) A veranda; a porch.
Top Definition. piazza. A word very common to Worcester, MA into the 1960's, maybe even used today. It's the porch on a three story house (a three decker). I lived in a three decker house and had a back porch and a front piazza. The family would go out on the piazza on hot or rainy days to get out of the house.