…of a colour at the end of the spectrum next to orange and opposite violet, as of blood, fire, or rubies…
…denoting colour blindness in which reds and greens are confused, either protanopia (daltonism) or deuteranopia…
…communist or socialist (used especially during the Cold War with reference to the Soviet Union)…
…a box, typically covered with red leather, used by a Minister of State to hold official documents…
…the undesirable effect in flash photography of people appearing to have red eyes, caused by a reflection from the retina when the flashgun is too near the camera lens…
…a common fox with a reddish coat, native to both Eurasia and North America and living from the Arctic tundra to the centres of cities…
…a long, narrow nearly landlocked sea separating Africa from the Arabian peninsula. It is linked to the Indian Ocean in the south by the Gulf of Aden and to the Mediterranean in the north by the Suez Canal…
…a red-brown azo dye which becomes blue in acidic conditions, used as a chemical indicator and as a stain in histology…
