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| a gadget; dingus; thingumbob. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
helicoid hel·i·coid (hěl'ĭ-koid', hē'lĭ-)
adj.
Arranged in or having the general shape of a flattened coil or spiral.
| helicoid (hěl'ĭ-koid', hē'lĭ-) Pronunciation Key
Adjective Arranged in or having the approximate shape of a flattened coil or spiral curve. Noun A surface in the form of a coil or screw. A helicoid is generated mathematically by rotating a plane or twisted curve about an axis at a fixed rate and simultaneously translating it in the direction of the line of axis, also at a fixed rate. |