| rotenone |
a white, odorless, poisonous, crystalline compound obtained from the roots of derris and cube plants and used in insecticides and treatments for chiggers and scabies. |
| rotifer |
any of a group of mostly freshwater, microscopic, multicellular organisms that have one or more wheel-like rings of cilia at the front end which appear to rotate when vibrated. |
| rotisserie |
a broiler with a rotating spit, usu. driven by an electric motor. [2 definitions] |
| rotl |
in Mediterranean and esp. Muslim countries, a unit of weight, varying from about one to five pounds. |
| roto |
rotogravure. |
| rotogravure |
a printing process in which images or letters etched on a copper cylinder are transferred to paper or a similar surface in a rotary press. [2 definitions] |
| rotor |
the rotating part of a machine, usu. within a stationary part or housing. [2 definitions] |
| Rototiller |
trademark for a small motor-driven cultivator having rotary blades, used esp. in home vegetable gardens. [2 definitions] |
| rotten |
in the process of rotting or the state of being rotted; decaying or decayed. [5 definitions] |
| rotten borough |
any district having more representatives in government than its population warrants. |
| Rottweiler |
(sometimes l.c.) any of a breed of strong German dog having short black hair and tan markings. |
| rotund |
round or full in shape; plump; stout. [2 definitions] |
| rotunda |
a round building or section of a building, esp. one that has a dome. [2 definitions] |
| rouble |
a spelling of "ruble" used in Canada and Britain. See "ruble" for more information. |
| roué |
a man of low morals or extravagant habits. |
| rouge |
any of various red or pink cosmetics used to color the cheeks or lips. [3 definitions] |
| rough |
having an uneven surface; not smooth; coarse. [14 definitions] |
| roughage |
food that contains a high proportion of cellulose, which stimulates intestinal functioning. |
| rough-and-ready |
rough or crude but adequate to meet a need. [2 definitions] |
| rough-and-tumble |
characterized by or inclined toward roughness, disorder, and disregard for rules or niceties. |
| roughcast |
a coarse plaster made of mortar mixed with small stones, used as a finish for exterior walls. [4 definitions] |