| 单词 | spiral |
| 释义 | spiral —spirality /spuy ral"i tee/, n. —spirally, adv. /spuy"reuhl/, n., adj., v., spiraled, spiraling or (esp. Brit.) spiralled, spiralling. n. 1. Geom. a plane curve generated by a point moving around a fixed point while constantly receding from or approaching it. 2. a helix. 3. a single circle or ring of a spiral or helical curve or object. 4. a spiral or helical object, formation, or form. 5. Aeron. a maneuver in which an airplane descends in a helix of small pitch and large radius, with the angle of attack within that of the normal flight range. 6. Football. a type of kick or pass in which the ball turns on its longer axis as it flies through the air. 7. Econ. a continuous increase in costs, wages, prices, etc. (inflationary spiral), or a decrease in costs, wages, prices, etc. (deflationary spiral). adj. 8. running continuously around a fixed point or center while constantly receding from or approaching it; coiling in a single plane: a spiral curve. 9. coiling around a fixed line or axis in a constantly changing series of planes; helical. 10. of or of the nature of a spire or coil. 11. bound with a spiral binding; spiral-bound: a spiral notebook. v.i. 12. to take a spiral form or course. 13. to advance or increase steadily; rise: Costs have been spiraling all year. 14. Aeron. to fly an airplane through a spiral course. v.t. 15. to cause to take a spiral form or course. [1545-55; < ML spiralis, equiv. to L spir(a) coil ( < Gk speîra anything coiled, wreathed, or twisted; see SPIRE2) + -alis -AL1] |
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