concave


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Synonyms for concave

Synonyms for concave

curving inward

Antonyms for concave

curving inward

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References in classic literature ?
The cylinder once lighted, the hydrogen in the spiral and in the concave cone becomes heated, and rapidly ascends through the pipe that leads to the upper part of the balloon.
Some parts brilliantly lighted, especially on its concave part, showed the presence of high mountains, often disappearing behind thick spots, which are never seen on the lunar disc.
In ordinary combs it has appeared to me that the bees do not always succeed in working at exactly the same rate from the opposite sides; for I have noticed half-completed rhombs at the base of a just-commenced cell, which were slightly concave on one side, where I suppose that the bees had excavated too quickly, and convex on the opposed side, where the bees had worked less quickly.
I cannot refrain from once again remarking on the singularity of these complex structures -- a great sandy and generally concave disk rises abruptly from the unfathomable ocean, with its central expanse studded, and its edge symmetrically bordered with oval basins of coral-rock just lipping the surface of the sea, sometimes clothed with vegetation, and each containing a lake of clear water!
Learned Faustus, To find the secrets of astronomy Graven in the book of Jove's high firmament, Did mount him up to scale Olympus' top; Where, sitting in a chariot burning bright, Drawn by the strength of yoked dragons' necks, He views the clouds, the planets, and the stars, The tropic zones, and quarters of the sky, From the bright circle of the horned moon Even to the height of Primum Mobile; And, whirling round with this circumference, Within the concave compass of the pole, From east to west his dragons swiftly glide, And in eight days did bring him home again.
And the same object appears straight when looked at out of the water, and crooked when in the water; and the concave becomes convex, owing to the illusion about colours to which the sight is liable.
The flanks of the dark, moving mass, were advanced in such a manner as to make a concave line of the front, and every fierce eye, that was glaring from the shaggy wilderness of hair in which the entire heads of the males were enveloped, was riveted with mad anxiety on the thicket.
At the highest the effect was that of a concave relief map; Bert saw the dark and crowded land everywhere intersected by shining waters, saw the Hudson River like a spear of silver, and Lower Island Sound like a shield.
In common speech we refer all things to time, as we habitually refer the immensely sundered stars to one concave sphere.
Of what use is genius, if the organ is too convex or too concave and cannot find a focal distance within the actual horizon of human life?
Seed yield and 100-seed weight did not differ for beater, concave and beater x concave combinations in both Experiment I and II (Table 5).
The pattern of LL and LU was calculated from the shape of the vertical GRF, from which we identified three patterns: concave curvature, convex curvature, and linear (Figure 1(d)).
This 16-bit concave grating spectrometer is USB-2 powered, shock-proof and vibration tolerant with no moving parts.
Thus the (6) and (8) satisfies the conditions of log concave and log convex for sequence.
Therefore, the following connection shapes were studied: external conical, internal conical, concave, convex, concave-convex and convex-concave.