1 Cinquains are five lines long. 2  They have 2 syllables in the first line, 4 in the second, 6 in the third, 8 in the fourth line, and just 2 in the last line. 3  Cinquains do not need to rhyme, but you can include rhymes if you want to.
â¢ COMBUSTIBLE MATERIAL (noun). The noun COMBUSTIBLE MATERIAL has 1 sense: 1. a substance that can be burned to provide heat or power. Familiarity information: COMBUSTIBLE MATERIAL used as a noun is very rare. COMBUSTIBLE MATERIAL (noun). The noun COMBUSTIBLE MATERIAL has 1 sense: 1. a substance that can be burned to provide heat or power. Familiarity information: COMBUSTIBLE MATERIAL used as a noun is very rare.
Polyurethanes are a good example of a traditional organic polymer system that has useful structural and mechanical properties, but is limited by its low thermo-oxidative stability. Although many varieties of this polymer are widely used in aerospace applications and home construction, they are highly combustible.