| rivet |
a metal pin that has a head at one end and is hammered flat at the other end after the shank has been passed through holes in the metal plates or other objects to be pinned together. [3 definitions] |
| Rn |
symbol of the chemical element radon. |
| roach1 |
a cockroach. |
| road |
a long, narrow course, often with a smooth and paved surface, made for the passage of vehicles and people. [3 definitions] |
| road map |
a motorist's map that shows the routes, road types, mileage between towns, and the like for a specified region. |
| roadrunner |
a ground-dwelling, swift North American cuckoo with a long tail, a crest, and streaked plumage. |
| roadside |
the side or edge of a road. [2 definitions] |
| roam |
to proceed or travel without a fixed course or destination; wander. [3 definitions] |
| roan |
having a dark coat thickly sprinkled with white (used esp. of horses). [3 definitions] |
| roar |
to utter a prolonged cry or shout that is both deep and loud. [8 definitions] |
| roast |
to cook or bake (meat) with dry heat, as in an oven or over an open fire. [12 definitions] |
| rob |
to steal money or property from unlawfully and with the use or threat of force. [4 definitions] |
| robber |
a person who steals by using or threatening to use force. |
| robbery |
the act or practice or an instance of robbing, esp. with the threat or use of force. |
| robe |
a long, loose gown or outer garment, such as one worn by certain officials or during certain ceremonies. [4 definitions] |
| robin |
a large North American songbird related to the thrush, with an orange-red breast, dark brown head and back, and a bright yellow bill. [2 definitions] |
| robot |
a mechanical device, esp. one controlled electronically, that can perform physical tasks of a human being, often used in industrial assembly or the like. [2 definitions] |
| robust |
physically strong, healthy, and energetic. [6 definitions] |
| rock1 |
a large mass of hard mineral matter that lies under the earth's soil or forms a cliff, mountain, or the like. [4 definitions] |
| rock2 |
to sway strongly back and forth or from side to side. [9 definitions] |
| rocker |
one of the curved elements on the bottom of a chair, cradle, or other device to allow for rocking motion. [3 definitions] |