• ianmooreplaysfiddle


Updated: Jan 31, 2019

Behold -- Strophata aeruginosa, the verdigris agaric!

If something is aeruginous it is not by nature sexually arousing (erogenous); instead, aeruginous means the color of copper oxide, the grey-green 'rust' -- verdigris -- that forms on copper, brass and bronze.

This is a twofer entry, because discussing aeruginous sort of demands that we also take note of another color word: ferruginous, that is, the color of iron rust, rusty red.

(what an excellent painting, eh? the Ferruginous Thrush by John James Audubon)

The word for iron in Latin is fer, 'iron rust' was ferrugo. The word for copper in Latin is aes, and I guess they just slapped '-rugo' on there to make aeruginous. The word for rust more generally was 'robigo'; agronomists take note, Ancient Rome held a yearly dog sacrifice on April 25th to propitiate a god named Robigo, who presided over diseases that could kill the crops -- rust never dies...

#etymology #verdigris #latin #scientificnames


Recent Posts

See All


I've got a quick explanation of what the 'quintessence' was down below, but first I want to thank my various nutty comrades on the internet who helped me compile the following list of pentads, quintup

Novus Mundus Americanus

So, a friend of mine brought my attention to the place-name colonization going on in New York City right now — neighborhoods are getting new monikers to make them more palatable to gentrification — I


Oh what a wonderful word! I suppose I should have written about this at Halloween, but better late than never — Ok, we all recognize cephalo-, yeah? It’s greek for head, and you learned about it in

© 2023 by Rafael Nash. Proudly created with