“A cactolith is a quasihorizontal chonolith composed of anastomosing ductoliths whose distal ends curl like a harpolith, thin like a sphenolith, or bulge discordantly like an akmolith or ethmolith.”

That’s from USGS researcher Charles B. Hunt’s 1953 paper “Geology and Geography of the Henry Mountains Region, Utah.” He was describing an actual geological feature — but also commenting on the absurd profusion of –lith words in geology.

Word Ways chose it as its word of the year for 2010.