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Related to vermilion: vermilion border
vermilion, vivid red pigment of durable quality. It is a chemical compound of mercury and sulfur and is known as red sulfide of mercury; it was formerly obtained by grinding pure cinnabar but is now commonly prepared synthetically. Vermilion is a good pigment for protecting iron and steel and is therefore used in paints. It is commonly adulterated because of its high cost. Certain other materials are sometimes called vermilion; among them is imitation vermilion, prepared from a combination of red lead or basic lead chromate and certain other chemicals.
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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. a bright red to reddish-orange colour
2. mercuric sulphide, esp when used as a bright red pigment; cinnabar
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005