The term 'COMET CLOUD' is composed of two words. The first word, 'COMET', is a 4-letter word meaning a small celestial body that orbits the sun and has a visible COMA and sometimes a tail. The second word, 'CLOUD', is a 5-letter word meaning a visible mass of condensed water droplets or ice crystals suspended in the atmosphere. Together, the term 'COMET CLOUD' refers to the visible COMA and tail of a COMET, which is composed of dust, gas, and ice particles.