| rectangle |
a flat, closed figure with four straight sides, four right angles, and opposite sides parallel to each other. |
| rectangular |
having the shape of a rectangle. The square is one example of a rectangular shape. |
| recuperate |
to become healthy again after being ill. |
| recur |
to happen again or over and over. |
| recyclable |
able to be reused in some form, either fully or partially. [2 definitions] |
| recycle |
to put through a process that allows used things to be reused. |
| recycling bin |
a container used for holding discarded items, such as aluminum cans, plastic bottles, and newspapers, which are intended to be recycled. |
| red |
the color of blood; the first color on the color spectrum. [2 definitions] |
| red blood cell |
a cell in the blood that carries oxygen to the body's tissues. |
| redcoat |
a British soldier in colonial America during the American Revolution and other wars. |
| Red Cross |
an international organization that gives medical care to people hurt during wars and natural disasters. |
| redeem |
to exchange for cash, prizes, or other goods. [2 definitions] |
| red-handed |
in the act of doing something wrong or illegal. |
| Red Sea |
a part of the Indian Ocean. It lies between the Arabian Peninsula and East Africa. The Suez Canal connects it to the Mediterranean Sea. |
| reduce |
to make less in amount or size. [2 definitions] |
| reduction |
the act of reducing or state of being reduced. [2 definitions] |
| redwood |
a very tall evergreen tree found in northwestern North America. Redwoods live for a long time and are among the largest trees in the world. [2 definitions] |
| reed |
a tall grass with straight, jointed stalks that grows in low, wet areas. [2 definitions] |
| reef1 |
a ridge of rock, sand, or coral at or near the surface of ocean waters. |
| reek |
to put out a strong and unpleasant smell (often fol. by "of"). [2 definitions] |
| reel1 |
a spool or other device on which fishing line, cord, tape, film, or other material can be wound. [4 definitions] |