from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of helicoid.
Sorry, no etymologies found.
In 1952, he started publishing Gastropodia; the 1st paper in the 1st issue was titled: "Pulmonata, Xanthonycidae: comparative sexological studies of the North American land-snail, Monadenia fidelis Gray – a seeming ally of Mexican helicoids."
The shortlist is completed by The Changing World of Inflammatory Bowel Disease and Crocheting Adventures with Hyperbolic Planes, which informs its readers how to "crochet models of the hyperbolic plane, pseudosphere, and catenoid/helicoids", as well as exploring geometry and its historical connections with art, architecture, navigation and motion, and the history of crochet.
Moreover, the barrel is not subject to stray light entering from external helicoids that can negatively affect images.