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artesian [artesian 词源字典]: artesian: [19] In the 18th century drillings made in Artois (a former northern French province roughly corresponding to the modern Pas-de- Calais) produced springs of water which rose spontaneously to the surface, without having to be pumped. The name of the province, in its erstwhile form Arteis, was bestowed on the phenomenon, and has been so used ever since.
[artesian etymology, artesian origin, 英语词源]
fire-damp (n.): "marsh gas," 1670s, from fire (n.) + damp (n.) "noxious vapor." Largely methane, it can spontaneously ignite when mixed with atmospheric air.
ludic (adj.): "spontaneously playful," 1940, from French ludique, from Latin ludere "to play" (see ludicrous).
spontaneous (adj.): 1650s, "occurring without external stimulus," from Late Latin spontaneus "willing, of one's free will," from Latin (sua) sponte "of one's own accord, willingly;" of uncertain origin. Related: Spontaneously; spontaneousness. Used earlier of persons and characters, with a sense "acting of one's own accord" (c. 1200). Spontaneous combustion first attested 1795. Spontaneous generation (the phrase, not the feat) attested from 1650s.