245 reported on the synthesis of linear but alsobranched polymers prepared by di-, tri-, and tetra-alkyne andazide monomers like the combination of tripropargylamine(B 3)and(dihydroxymethyl)(diazidomethyl)amine(A 2)(com-pare the general outline in Scheme 17).
When discussing mineral formations in caves, we often talk about stalactites and stalagmites. A stalactite is an icicle-shaped formation that hangs from the ceiling of a cave, and is produced by precipitation of minerals from water dripping through the cave ceiling. Most stalactites have pointed tips.
Once it hits the Earth, the fragments (if any!) are called meteorites.   A meteorite is a rock, usually big, that is in space outside of Earth's atmosphere. A meteor is a meteorite that has entered Earth's atmosphere without burning up. A meteoroid is in space, a sand to boulder-sized piece of space debris orbiting the Sun.