Density is the measure of how many atoms are in a given space of a material. Basically, itâs how closely packed the atoms are in a material. To measure a materialâs density, you need to know how many atoms are in the material (the mass), and how much space it takes (volume).
Freebase(0.00 / 0 votes)Rate this definition: Wind rose. A wind rose is a graphic tool used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location. Historically, wind roses were predecessors of the compass rose, as there was no differentiation between a cardinal direction and the wind which blew from such a direction.
Drift roses were developed for use as flowering ground covers. Drift roses (Rosa Drift varieties), generally hardy in U.S. Department of Agriculture plant hardiness zones 4 or 5 through 11, are a series of ground-cover roses designed for versatility in landscape applications. Drift roses are wider than they are tall -- usually about 18 inches tall by 30 inches wide. The plants bloom repeatedly throughout the growing season and are simple to maintain.