from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of semicylinder.
Sorry, no etymologies found.
He had seen structures of all shapes and sizes -- narrow skyscrapers, vast-spreading one-stories, polyhedra, domes, spheres, semicylinders, and erect and inverted full and truncated cones and pyramids.
Bramah patented quill nibs made by splitting quills and cutting the semicylinders into sections which were shaped into pens and adapted to be placed in a holder.