| Red Sea |
an extension of the Indian Ocean northwest between Arabia and Africa. |
| red shift |
the tendency of light waves from distant luminous bodies such as galaxies to decrease in frequency with movement away from the observer. (See Doppler effect.) |
| redshirt |
(informal) to withdraw a varsity athlete from competition for a year in order to extend his or her eligibility. [2 definitions] |
| redskin |
(offensive slang) an American Indian. |
| red snapper |
any of several tropical or semitropical marine food fishes having reddish bodies. |
| red spider |
any of various small red spiderlike mites that feed on vegetation. |
| red squirrel |
a common North American tree squirrel with reddish or tawny fur. |
| redstart |
an American warbler, the male of which is mostly black with bright orange patches on the wings and tail. [2 definitions] |
| red tape |
official forms, regulations, and procedures, esp. those resulting in delay and frustration. |
| red tide |
a brownish red discoloration of sea waters caused by a local overabundance of certain single-celled algae that are toxic to many forms of marine life. |
| redtop |
a grass with reddish flower clusters that is grown for hay, pasturage, and lawns. |
| reduce |
to make less in amount or size. [7 definitions] |
| reducing agent |
a substance that chemically reduces or causes reduction in another substance, and that is itself oxidized in the process. |
| reductio ad absurdum |
(Latin) the disproof of a proposition by demonstrating the impossibility or absurdity of its logical conclusion. |
| reduction |
the act of reducing or state of being reduced. [4 definitions] |
| reductionist |
indicating the oversimplification of complex ideas or data. |
| reductive |
relating to or characterized by reducing or abridgment. [2 definitions] |
| redundancy |
the state or quality of being redundant. [4 definitions] |
| redundant |
unnecessarily repetitive. [3 definitions] |
| reduplicate |
to repeat or duplicate. [5 definitions] |
| reduplication |
the act of reduplicating or the state of being reduplicated. [2 definitions] |