Erythrin

Part of speech: noun

Definitions

1. A natural pigment found in certain plants and algae, responsible for red or pink coloration
2. A type of biochromatic compound known for its characteristic hue, predominantly observed in specific aquatic organisms
3. An organic molecule contributing to the red pigmentation in some marine species and terrestrial flora

Etymology: Erythrin is a red pigment found in nature, and its name comes from the Ancient Greek "eruthrós," meaning "red." The name is a little misleading to the modern ear, since the substance is not a mineral dye but a compound produced by lichens and some algae, and it lends a rosy tone to certain mineral and plant deposits. The Greek word itself is the root of several scientific terms built on the same colour, which is why the stem turns up in chemistry and biology labels far more often than in everyday speech. The Greek adjective "eruthrós" was not coined for pigments at all. It was an ordinary word for red, and chemists and naturalists in later centuries drew on it when they needed a name for a newly isolated red substance. So the word describes the colour the substance shows, not the way it was first discovered or classified.