| racial |
having to do with a race of people. [2 definitions] |
| racing |
the sport of competing with others to be the fastest, especially in driving a car or riding a horse. |
| racism |
the opinion or belief that a particular race of people is better than another race or races. [2 definitions] |
| racist |
believing, implying, or claiming that one race of human beings is superior to another or others. [3 definitions] |
| rack1 |
a frame or stand used to hold, hang, or show things. [4 definitions] |
| racket1 |
a loud, confusing noise. [2 definitions] |
| racket2 |
an object used to hit the ball in tennis and similar sports. It is made of a round or oval frame with a network of tightly laced strings and a long handle. |
| racquetball |
a game played by two or four players in a small court with four walls. The players use rackets to hit a rubber ball against the walls. |
| radar |
the use of radio waves to track the location, distance, and speed of faraway objects. Waves are sent out and then picked up again when they bounce back after hitting some object. [2 definitions] |
| radiant |
sending out heat or rays of light; shining brightly. [2 definitions] |
| radiate |
to come out in the form of rays or waves. [4 definitions] |
| radiation |
the waves of energy sent out by sources of heat or light, or by radioactive material. |
| radiator |
a device that uses steam or hot water passing through pipes in order to heat a room. [2 definitions] |
| radical |
having to do with the root or source; basic; fundamental. [4 definitions] |
| radii |
a plural of "radius." |
| radio |
a way of sending signals made of waves that travel through the air. These radio waves are picked up and translated into sounds by electronic devices. [3 definitions] |
| radioactive |
giving off energy as a result of the decay of unstable atoms. |
| radioactivity |
the giving off of energy as a result of the decay of unstable atoms. |
| radish |
a plant that has a crisp and strong-tasting root. [2 definitions] |
| radium |
a silver-white, radioactive metal that is one of the chemical elements. Radium glows in the dark. It is used to treat cancer. (symbol: Ra) |
| radius |
a straight line from the center to the edge of a circle or sphere. [2 definitions] |