Resembling blood in appearance or having blood-like qualities, often used to describe certain minerals or rocks with a reddish color.
From Greek 'haima' (blood) + '-oid' (resembling or similar to). The suffix '-oid' was added to create an adjective meaning blood-like, commonly used in mineralogy and geology.
Hematoid quartz, a crystal with red streaks from iron oxide, gets its name because it looks like blood is trapped inside the stone—ancient miners thought it might actually contain magical properties.
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