| a scrap or morsel of food left at a meal. |
| a chattering or flighty, light-headed person. |
red1 (rɛd) ![]() | |
| —n | |
| 1. | any of a group of colours, such as that of a ripe tomato or fresh blood, that lie at one end of the visible spectrum, next to orange, and are perceived by the eye when light in the approximate wavelength range 740--620 nanometres falls on the retina. Red is the complementary colour of cyan and forms a set of primary colours with blue and greenRelated: rubicund, ruddy |
| 2. | a pigment or dye of or producing these colours |
| 3. | red cloth or clothing: dressed in red |
| 4. | a red ball in snooker, billiards, etc |
| 5. | (in roulette and other gambling games) one of two colours on which players may place even bets, the other being black |
| 6. | archery Also called: inner a red ring on a target, between the blue and the gold, scoring seven points |
| 7. | informal in the red in debit; owing money |
| 8. | informal see red to become very angry |
| —adj , redder, reddest | |
| 9. | of the colour red |
| 10. | reddish in colour or having parts or marks that are reddish: red hair; red deer |
| 11. | having the face temporarily suffused with blood, being a sign of anger, shame, etc |
| 12. | (of the complexion) rosy; florid |
| 13. | (of the eyes) bloodshot |
| 14. | (of the hands) stained with blood, as after committing murder |
| 15. | bloody or violent: red revolution |
| 16. | (of wine) made from black grapes and coloured by their skins |
| 17. | denoting the highest degree of urgency in an emergency; used by the police and the army and informally (esp in the phrase red alert) |
| 18. | (US) Compare blue relating to, supporting, or representing the Republican Party |
| —vb , redder, reddest, reds, redding, redded | |
| 19. | another word for redden |
| Related: rubicund, ruddy | |
| [Old English rēad; compare Old High German rōt, Gothic rauths, Latin ruber, Greek eruthros, Sanskrit rohita] | |
| 'redly1 | |
| —adv | |
| 'redness1 | |
| —n | |
red2 (rɛd) ![]() | |
| —vb , reds, redding, red, redded | |
| (tr) a variant spelling of redd | |
r abbr.
racemic
R abbr.
radical (usually an alkyl or aryl group)
respiration
respiratory exchange ratio
or r roentgen
| r
Abbreviation of radius |
| R
The symbol for resistance. |
in the red
In debt, as in Joshua can't keep track of funds, so half the time his company is in the red. This expression alludes to the bookkeeping practice of marking debits in red ink and credits in black. It survives even in the age of computerized accounts. So does the antonym, in the black, for being financially solvent or out of debt, as in Bill was happy to say they were in the black. [Early 1900s]