The term PART OF A LUNAR CYCLE can be summarized as a PHASE, which is a five-letter word. A lunar cycle is the period of time it takes for the Moon to complete one orbit around the Earth. During this cycle, the Moon goes through different phases, such as waxing, waning, and full moon. Each PHASE has its own characteristics, such as the amount of light that is reflected from the Moon's surface. The phases of the Moon are important for many cultures, as they are used to mark special occasions and festivals.