| 释义 |
alto-cumulus Meteorol.|ˌæltəʊˈkjuːmjʊləs|
[mod.L. alto-, f. L. altus high + cumulus.]
A cloud-formation made up of rounded masses similar to cumulus clouds but at a higher altitude; a cloud of this kind. Similarly alto-ˈstratus, a cloud-formation consisting of a more or less uniform continuous layer or veil resembling stratus or cirro-stratus clouds but lying in the middle-cloud region. So alto(-) cloud, an alto-cumulus or alto-stratus cloud; also alto ellipt.
1894Nature 8 Feb. 344/2 Clouds having altitudes from 3000 to 6000 metres... Alto-cumulus... Alto-stratus. 1898Jrnl. Sch. Geogr. (U.S.) Oct. 297 The development of alto-cumulus and heavy cumulus clouds over the land, while out to sea only small cumuli were visible. 1905Clayden Cloud Studies 59 From cirro-cumulus and cirro-stratus we pass through almost insensible gradations to the denser forms classed together in the alto group. Ibid. 62 The simplest alto cloud is alto-stratus. |