| 单词 | spontaneous |
| 释义 | spontaneous adj. 1. acting or done or occurring without external cause. 2. voluntary, without external incitement (made a spontaneous offer of his services). 3. Biol. (of structural changes in plants and muscular activity esp. in young animals) instinctive, automatic, prompted by no motive. 4. (of bodily movement, literary style, etc.) gracefully natural and unconstrained. 5. (of sudden movement etc.) involuntary, not due to conscious volition. 6. growing naturally without cultivation. Phrases and idioms spontaneous combustion the ignition of a mineral or vegetable substance (e.g. a heap of rags soaked with oil, a mass of wet coal) from heat engendered within itself, usu. by rapid oxidation. spontaneous generation the supposed production of living from non-living matter as inferred from the appearance of life (due in fact to bacteria etc.) in some infusions; abiogenesis. spontaneous suggestion suggestion from association of ideas without conscious volition. Derivatives spontaneity n. spontaneously adv. spontaneousness n. Etymology: LL spontaneus f. sponte of one's own accord |
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