| 释义 |
Definition of prograde in English: progradeadjective ˈprəʊɡreɪdˈprōˌɡrād 1Astronomy
(of planetary motion) proceeding from west to east; direct. 〔天文〕（行星运动）同向旋转的；顺行的。RETROGRADE 的反义词 The opposite of retrograde Example sentencesExamples - Numerous small, distant satellites in both prograde and retrograde orbits have been discovered recently.
- These are all in circular prograde orbits near Neptune's equatorial plane, and they probably formed in place.
- The fact that the moons move in a circular prograde orbit, close to the asteroid's equatorial plane, also lends support to this scenario.
- Two of the new moons have prograde orbits - that is, they orbit in the same direction as the planet turns.
- While this relatively simple model will explain prograde and retrograde motion qualitatively, it fails on detail, so additional complications were added to improve the fit to reality.
2Geology
(of a metamorphic change) resulting from an increase in temperature or pressure. 〔地质〕前进变质作用的，进化变质作用的 Example sentencesExamples - The apparent critical temperature between 560 to 600°C for monazite growth at Ballachulish is broadly consistent with several previous studies of monazite in prograde metamorphic sequences.
- Both thrust and normal faults initiated synchronously with Miocene prograde metamorphism and melting, and have moved episodically since then.
- These rocks display clear prograde metamorphism that peaks in granulite facies.
- Given the stability of zircon during metamorphic processes, it may be assumed that the formation of new zircons in prograde metamorphism is not significant until the appearance of melt.
- During the cooling stage the isotherms will retreat towards the host rock-container interface, leaving behind a sequence of largely prograde metamorphic zones outside the sarcophagus of melted and recrystallized granite.
verb ˈprəʊɡreɪdˈprōˌɡrād [no object]Geology (of a coastline) advance towards the sea as a result of the accumulation of waterborne sediment. 〔地质〕海岸推进，岸进 these oolites were probably deposited as part of the coastal sand-barrier complex as it prograded basinwards Example sentencesExamples - As the facies progrades, it incorporates gray, fine-grained, thin sandstone beds with sharply defined lower boundaries, wave-rippled lamination, and rippled tops.
- Through time, the basin shrank as it filled with sediment that prograded inward along the margins, most rapidly along the Eastern Shelf.
- The zone of active deltaic growth faulting (and margin-parallel maximum horizontal stress) has shifted basin-wards as the delta system has rapidly prograded across the shelf.
- In time, as the Ecca Sea filled with sediment and the deltas prograded basinward, large tracts of river channels and floodplains emerged.
- A slightly later phase of deglaciation occurred when the ice margin retreated north into St. George's Channel, forming the raised ice contact delta at the Screen Hills, which prograded southwards into high relative sea level.
Derivativesnoun Marine deposition was followed by alluvial progradation marking the onset of continental deposition, which dominated the rest of the Triassic in the region. Example sentencesExamples - Autocyclic processes such as tidal-flat progradation or tidal-flat island progradation are also possible mechanisms for the Gibraltar cycles.
- Overall the temporal progradation of nappe emplacement and high-pressure metamorphism towards the south mimics the southward retreat of the Hellenic subduction zone.
- Their internal structure shows growth by combined vertical aggradation and progradation away from the symmetry plane.
- Either allocyclic variations in fluvial discharge or the mouthward progradation of the fluvial system may explain the interbedded relationship of this facies with the cross-bedded sandstone.
OriginEarly 20th century (as a verb): from pro-1 'forwards' + retrograde. Definition of prograde in US English: progradeadjectiveˈprōˌɡrād 1Astronomy
(of planetary motion) proceeding from west to east; direct. 〔天文〕（行星运动）同向旋转的；顺行的。RETROGRADE 的反义词 The opposite of retrograde Example sentencesExamples - While this relatively simple model will explain prograde and retrograde motion qualitatively, it fails on detail, so additional complications were added to improve the fit to reality.
- The fact that the moons move in a circular prograde orbit, close to the asteroid's equatorial plane, also lends support to this scenario.
- Numerous small, distant satellites in both prograde and retrograde orbits have been discovered recently.
- These are all in circular prograde orbits near Neptune's equatorial plane, and they probably formed in place.
- Two of the new moons have prograde orbits - that is, they orbit in the same direction as the planet turns.
2Geology
(of a metamorphic change) resulting from an increase in temperature or pressure or both. 〔地质〕前进变质作用的，进化变质作用的 Compare with retrograde Example sentencesExamples - During the cooling stage the isotherms will retreat towards the host rock-container interface, leaving behind a sequence of largely prograde metamorphic zones outside the sarcophagus of melted and recrystallized granite.
- Both thrust and normal faults initiated synchronously with Miocene prograde metamorphism and melting, and have moved episodically since then.
- The apparent critical temperature between 560 to 600°C for monazite growth at Ballachulish is broadly consistent with several previous studies of monazite in prograde metamorphic sequences.
- These rocks display clear prograde metamorphism that peaks in granulite facies.
- Given the stability of zircon during metamorphic processes, it may be assumed that the formation of new zircons in prograde metamorphism is not significant until the appearance of melt.
verbˈprōˌɡrād [no object]Geology (of a coastline) advance toward the sea as a result of the accumulation of waterborne sediment. 〔地质〕海岸推进，岸进 these oolites were probably deposited as part of the coastal sand-barrier complex as it prograded basinwards Example sentencesExamples - Through time, the basin shrank as it filled with sediment that prograded inward along the margins, most rapidly along the Eastern Shelf.
- A slightly later phase of deglaciation occurred when the ice margin retreated north into St. George's Channel, forming the raised ice contact delta at the Screen Hills, which prograded southwards into high relative sea level.
- The zone of active deltaic growth faulting (and margin-parallel maximum horizontal stress) has shifted basin-wards as the delta system has rapidly prograded across the shelf.
- As the facies progrades, it incorporates gray, fine-grained, thin sandstone beds with sharply defined lower boundaries, wave-rippled lamination, and rippled tops.
- In time, as the Ecca Sea filled with sediment and the deltas prograded basinward, large tracts of river channels and floodplains emerged.
OriginEarly 20th century (as a verb): from pro- ‘forwards’ + retrograde. |