Medical Definition of PUMICE. : a volcanic glass full of cavities and very light in weight used especially in powder form for smoothing and polishing. a volcanic glass full of cavities and very low in density that is used especially in powder form for smoothing and polishing. â puÂ·miÂ·ceous \pyue-pyÃ¼-Ëmi, shÉs-\ ËpÉ. Adjective see pumice defined For-english language. learners
Another thing that differs between the two planets is the direction of their rotation. Venus s rotation takes longer than a year and it rotates backwards. Note that a rotation is when an object spins once on its own axis.Our planet takes only 24 hours, or one full Earth day, to rotate on its axis and a year to revolve around the Sun. Venus, however, takes 243 days to turn one time on its axis and almost 225 days to revolve around the Sun in orbit.nother thing that differs between the two planets is the direction of their rotation. Venus s rotation takes longer than a year and it rotates backwards. Note that a rotation is when an object spins once on its own axis.
by Fraser Cain on May 14, 2008. Venus takes 224.65 days to complete each orbit. This is a little less than a year on Earth. But instead of a similar rotational period to Earthâs 24 hours, Venus takes 243 days to rotate once.