| FR | Fluoro Ruby |
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| ruby | Origin: F. Rubis (cf. Pr. Robi), LL. Rubinus, robinus, fr. L. Rubeus = red, reddish, akin to ruber. See Rouge, red. 1. <chemical> A precious stone of a carmine red colour, sometimes verging to violet, or intermediate between carmine and hyacinth red. It is a red crystallized variety of corundum. Besides the true or Oriental ruby above defined, there are the balas ruby, or ruby spinel, a red variety of spinel, and the rock ruby, a red variety of garnet. "Of rubies, sapphires, and pearles white." (Chaucer) 2. The colour of a ruby; carmine red; a red tint. "The natural ruby of your cheeks." (Shak) 3. That which has the colour of the ruby, as red wine. Hence, a red blain or carbuncle. 4. See Agate. 5. <ornithology> Any species of South American humming birds of the genus Clytolaema. The males have a ruby-coloured throat or breast. <chemistry> Ruby of arsenic, Ruby of sulphur, red silver. See Red. Source: Websters Dictionary (01 Mar 1998) |
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| ruby spots | <tumour> A red papule due to weakening of the capillary wall, seen mostly in persons over 30 years of age. Synonym: cherry angioma, De Morgan's spots, ruby spots. (05 Mar 2000) |
| rubytail | <zoology> A European gold wasp (Chrysis ignita) which has the under side of the abdomen bright red, and the other parts deep bluish green with a metallic luster. The larva is parasitic in the nests of other wasps and of bees. Source: Websters Dictionary (01 Mar 1998) |
| rubythroat | <ornithology> Any one of numerous species of humming birds belonging to Trochilus, Calypte, Stellula, and allies, in which the male has on the throat a brilliant patch of red feathers having metallic reflections; especially, the common humming bird of the Eastern United States (Trochilus colubris). Source: Websters Dictionary (01 Mar 1998) |
| rubywood | Red sandalwood. See Sandalwood. Source: Websters Dictionary (01 Mar 1998) |
| balas ruby | <chemical> A variety of spinel ruby, of a pale rose red, or inclining to orange. See Spinel. Origin: OE. Bales, balais, F. Balais, LL. Balascus, fr. Ar. Balakhsh, so called from Badakhshan, Balashan, or Balaxiam, a place in the neighborhood of Samarcand, where this ruby is found. Source: Websters Dictionary (01 Mar 1998) |
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| ruby spot |
Cherry angioma.
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| ruby | a deep and vivid red |
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| ruby | a transparent piece of ruby that has been cut and polished and is valued as a precious gem |
| ruby | a transparent deep red variety of corundum |
| ruby | having any of numerous bright or strong colors reminiscent of the color of blood or cherries or tomatoes or rubies |
| ruby | a spinel used as a gemstone (usually dark red) |
| ruby | hard durable wood of red sandalwood trees (Pterocarpus santalinus) |
| ruby | American kinglet with a notable song and in the male a red crown patch |
| ruby | American kinglet with a notable song and in the male a red crown patch |
| ruby | having any of numerous bright or strong colors reminiscent of the color of blood or cherries or tomatoes or rubies |
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