
l] noun, adjective, verb, spi·raled, spi·ral·ing or ( especially British ) spi·ralled, spi·ral·ling. | the offspring of a zebra and a donkey. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
spiral (ˈspaɪərəl) ![]() | |
| —n | |
| 1. | geometry one of several plane curves formed by a point winding about a fixed point at an ever-increasing distance from it. Polar equation of Archimedes spiral:r = aθ; of logarithmic spiral: log r = aθ; of hyperbolic spiral:rθ = a, (where a is a constant) |
| 2. | another name for helix |
| 3. | something that pursues a winding, usually upward, course or that displays a twisting form or shape |
| 4. | Compare spin a flight manoeuvre in which an aircraft descends describing a helix of comparatively large radius with the angle of attack within the normal flight range |
| 5. | economics a continuous upward or downward movement in economic activity or prices, caused by interaction between prices, wages, demand, and production |
| —adj | |
| 6. | having the shape of a spiral |
| —vb , -rals, -ralling, -ralled, -rals, -raling, -raled | |
| 7. | to assume or cause to assume a spiral course or shape |
| 8. | (intr) to increase or decrease with steady acceleration: wages and prices continue to spiral |
| [C16: via French from Medieval Latin spīrālis, from Latin spīra a coil; see | |
| 'spirally | |
| —adv | |
spiral spi·ral (spī'rəl)
adj.
Coiling or developing around an axis in a constantly changing series of planes; helical. n.
A structure in the shape of a coil. v. spi·raled or spi·ralled, spi·ral·ing or spi·ral·ling, spi·rals or spi·rals
To take the form or course of a spiral.