Today’s word of the day is alizarin, an orange-red crystalline compound, C₁₄H₆O₂(OH)₂, used in making dyes. It’s also a part of our very first list of the day, Reds, which features, ta-da, lots of words for red colors.

Bonuses: A list of red/pink colors and things tagged “red.”

Photo by Karin Dalziel, used here under a Creative Commons license.