The term FARM CYLINDER is composed of two words, the first being FARM and the second being SILO, which is a four letter word. A SILO is a cylindrical structure typically used to store grain or other agricultural products on a FARM. It is usually made of metal or concrete and is airtight to protect the contents from moisture and pests. The FARM cylinder is an important part of a FARM's infrastructure, as it allows farmers to store large amounts of grain for long periods of time.