mesoderm. in biology, middle layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form of a hollow ball.
8th Anniversary Gift Ideas. Traditionally, couples give gifts of bronze or pottery to celebrate their 8th wedding anniversary. Bronze is created by combining two different metals, copper and tin, to make something strong and beautiful, just like a marriage brings two people together into something more.
You are here: / / 55th Wedding Anniversary. There is no known name for a 55th wedding anniversary, though modern and traditional 55th wedding anniversary gifts have a theme of emerald. Some may call it the âEmerald Anniversary.â Like emeralds, a marriage that lasts 55 years is a very rare find.