Rock Salt: A chemical sedimentary rock that forms from the evaporation of ocean or saline lake waters. It is also known by the mineral name 'halite'. It is rarely found at Earth's surface, except in ar . . . View Full Definition
Chemical Sedimentary Rock: A rock that forms from the precipitation of mineral material from solution. Examples are chert and rock salt.
Rocket Scientist: An employee of an investment firm (often having a Ph.D. in physics or mathematics) that works on highly mathematic models of derivative pricing.
Rocket: A ball thrown with extra speed; see also bb and bullet.