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From Biology-Online Dictionary | Biology-Online Dictionary
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Of the colour of blood, or of a tint resembling that colour; of the hue of that part of the rainbow, or of the solar spectrum, which is furthest from the violet part. Fresh flowers, white and reede. Your colour, I warrant you, is as red as any rose. (Shak)

Red is a general term, including many different shades or hues, as scarlet, crimson, vermilion, orange red, and the like.

Red is often used in the formation of self-explaining compounds; as, red-breasted, red-cheeked, red-faced, red-haired, red-headed, red-skinned, red-tailed, red-topped, red-whiskered, red-coasted. Red admiral, kermesite. See kermes mineral, under Kermes.

(Science: botany) Red ash, any species of noctuid moths belonging to Catacola and allied genera. The numerous species are mostly large and handsomely coloured. The under wings are commonly banded with bright red or orange. Red water, a disease in cattle, so called from an appearance like blood in the urine.

Origin: OE. Red, reed, AS. Red, red; akin to OS. Rd, OFries, rd, D. Rood, G. Roht, rot, OHG. Rt, Dan. & Sw. Rd, Icel. Raur, rjr, Goth. Ruds, W. Rhudd, Armor. Ruz, Ir. & Gael. Ruadh, L. Ruber, rufus, Gr, Skr. Rudhira, rohita; cf. L. Rutilus. Cr. Erysipelas, Rouge, Rubric, Ruby, Ruddy, Russet, Rust.

1. The colour of blood, or of that part of the spectrum farthest from violet, or a tint resembling these. Celestial rosy red, love's proper hue.

2. A red pigment.

3. An abbreviation for Red republican. See Red.

4. (Science: medicine) The menses]]. English red, a pigment prepared by the dutch, similar to indian red. Hypericum red, a red resinous dyestuff extracted from Hypericum. Indian red. See Indian, and Almagra.