Grade

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Grade

(1) A designated ground level. (2) To change the contours of land.

References in classic literature ?
Amongst existing Vertebrata, we find but a small amount of gradation in the structure of the eye, and from fossil species we can learn nothing on this head.
These difficulties and objections may be classed under the following heads:- Firstly, why, if species have descended from other species by insensibly fine gradations, do we not everywhere see innumerable transitional forms?
Yet reason tells me, that if numerous gradations from a perfect and complex eye to one very imperfect and simple, each grade being useful to its possessor, can be shown to exist; if further, the eye does vary ever so slightly, and the variations be inherited, which is certainly the case; and if any variation or modification in the organ be ever useful to an animal under changing conditions of life, then the difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, can hardly be considered real.
In the Articulata we can commence a series with an optic nerve merely coated with pigment, and without any other mechanism; and from this low stage, numerous gradations of structure, branching off in two fundamentally different lines, can be shown to exist, until we reach a moderately high stage of perfection.
Seeing this gradation and diversity of structure in one small, intimately related group of birds, one might really fancy that from an original paucity of birds in this archipelago, one species had been taken and modified for different ends.
On the other hand, the CDWP also approved to release over Rs 700 million for up gradation and extension of Bannu Airport for Airbus and Boeing aircraft operations.
The existing speed of trains on ML-1 stands in between 60km/h to 120km/h, which, after up gradation, will run in-between 120km/h to 160km/h.
The Ministry of Textile Industry has approved the Technology Up- gradation Fund (TUF) to improve and enhance the output capacity of the industrial units across the country.
According to the view shared by most researchers, stop gradation developed independently in Finno-Saamic languages and in Samoyedic languages over three thousand years ago (Itkonen 1969; Laanest 1982; Gordon 1997 and others).
Given that the chord length index does not provide an accurate estimate of the air void content, an accurate estimate of the air void gradation curve in concrete specimens is needed.
Recyclers, HMA producers and agencies can now use this standard as a guide to carefully design shingles into the mix based on the RAS percent asphalt content, asphalt performance grade, aggregate gradation and amount of deleterious materials.