from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The study of the physical geography of mountains and mountain ranges.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the scientific study, or a physical description of mountains
- n. the orographic features of a region
from the GNU version of the Collaborative International Dictionary of English
- n. That branch of science which treats of mountains and mountain systems; orology.
from The Century Dictionary and Cyclopedia
- n. That division of physical geography or physiography which has to do with the relations and development of the mountain-chains of the regions described.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the science of mountains
Examples include the representation of clouds and radiation; dry and moist convective processes; the formation of precipitation and its deposition on the surface as rain or snow; the interactions between the atmosphere and the land-surface orography (including the drag on the atmosphere caused by breaking gravity waves); and atmospheric boundary-layer processes and their interaction with the surface.
It has a very complex orography whose determinants include a mountainous surface full of cliffs, ridges, hillsides and valleys, with a steep and highly dissected topography.
Who could advance objections against conscientious observers, who at less than twenty-four miles distance had marked that curious mountain of Tycho, the strangest system of lunar orography?
In the lunar orography they have discerned some chains of mountains, which are chiefly distributed over the northern hemisphere.
At this moment, to the left, lay extended one of the finest circles of lunar orography, one of the curiosities of this continent.
It possessed its own peculiar orography, a mountainous system, making it a world in itself.
Approaching now, through the high valleys, the central region of the mountain system of Corsica, this may be a proper place for a brief survey of the main features in its orography and geological structure.
Coahuila, in common with others of its neighbouring states, possesses some peculiar topographical conditions -- portions of it consisting of plains or valleys with no hydrographic outlet, as shown in the chapter dealing with the orography of the Republic.
Indeed, a study of Mexico's orography and the delineation upon the map shows the series of parallel features formed by alternate mountain-folds and intervening basins -- the peninsula of Lower California; the Gulf of the same name; the Western Sierra Madre; the intersecting crests of the great plateau; the Eastern Sierra Madre, and the Gulf Coast.
Its orography gives rise to the presence of numerous rivers and streams, all of which are upon the Atlantic watershed.