The abomasum, also known as the maw, and the rennet-bag,'s the fourth and final stomach compartment in ruminants. It secretes rennet, an ingredient used in cheese creation. The word abomasum's from New Latin and it was first used in English in 1706. It comes from Latin ab- + omasum "intestine of an ox," and it's possibly from the Gaulish language. The abomasum's normal anatomical location's along ventral midline. It's a secretory stomach similar in anatomy and function as the monogastric stomach… (More on Abomasum)