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redo to do again; do over. [2 definitions]
red oak any of several North American oaks that have dark bark, leaves with pointed tips, and a two-year maturation for their acorns. [2 definitions]
redolent permeated by or giving off a strong, usu. pleasant, odor; aromatic (usu. fol. by "with"). [2 definitions]
redouble to double or make twice as great; renew more vigorously; intensify. [7 definitions]
redoubt a small, independent, fortified enclosure for defense or protection. [2 definitions]
redoubtable inspiring fear; formidable. [2 definitions]
redound to yield or produce an effect, as on one's credit, honor, or the like. [3 definitions]
redox used as a short form of "oxidation-reduction," a chemical reaction in which one substance loses electrons to another substance. [2 definitions]
red pepper cayenne pepper. [2 definitions]
Red Planet see Mars.
redpoll any of various small finches characterized by a red patch on the crown of the head.
redraft a second or subsequent draft of a blueprint, plan, legislative bill, or the like. [2 definitions]
redraw combined form of draw.
redream combined form of dream.
redress compensation or reparation; amends. [4 definitions]
re-dress to dress or clothe once more; dress over again.
red salmon see sockeye salmon.
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.