concave

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concave

1. Physics having one or two surfaces curved or ground in the shape of a section of the interior of a sphere, paraboloid, etc.
2. Maths (of a polygon) containing an interior angle greater than 180°

concave

(kong-kayv , kong -kayv) Curving inward. A concave mirror converges light. A biconcave or planoconcave lens, thinner in the middle than at the edges, has a diverging action.

Concave

Forms that are curved like the inner surface of a hollow sphere or circular arc.

concave

[′kän‚kāv]
(science and technology)
Having a curved form which bulges inward resembling the interior of a sphere or cylinder or a section of these bodies.
References in periodicals archive ?
Changing the convexity and concavity of nasal cartilages and cartilage grafts with horizontal mattress sutures: part I.
Table 1 shows the dentine thickness and concavity depth measurements in the three levels evaluated below the furcation level (1, 2, and 4 mm).
Notations [a.sub.c]: Cutting depth (mm) [c.sub.d]: Concavity depth (mm) [c.sub.w]: Concavity width (mm) [F.sub.H]: Horizontal cutting force (N) [F.sub.n]: Normal force (N) [F.sub.t]: Tangential force (N) [F.sub.V]: Vertical cutting force (N) [h.sub.D]: Edge-indentation thickness (mm) N: Constant P: Normal load imposed on indenter (N) [[gamma].sub.s]: Rake angle of indenter (degree) [theta]: Initial angle of crack propagation (degree) [mu]: Friction coefficient v: Cutting speed (m/min) [[sigma].sub.b]: Tension strength (MPa) [[sigma].sub.bc]: Compressive strength (MPa) [[sigma].sub.eff]: Effective stress (MPa) [[sigma].sub.I]: Maximal principal stress (MPa) [[sigma].sub.III]: Minimum principal stress (MPa).
Competent Crassostrea virginica pediveligers were supplied by Fishers Island Oysters, NY (within-shell distribution and orientation experiments) and Southern Cross Oysters, FL (concavity and tertiary construction experiments).
Even though the support values were low, most of the clades found within the Cryphaeaceae-Pterobr-yaceae node were highly stable and were recovered under more than six concavity values (Fig.
19, characterised by a protruding stridulatory file at the base of the left tegmina, separated by the rest of wing by a concavity (see arrow in Fig.
(4.7) can be used to calculate the parameter [S.sub.z], by taking the total measured tool-axis inclination angle and tool concavity angle into account:
In their samples, which according to their measurements, follow a pattern of concavity to the outer cortical horizontally from posterior to anterior and with an alveolar concavity.
Caption: Figure 3: Radiograph of the dorsal spine (lateral projection) showing thoracic kyphosis and mild concavity in the anterior aspect of vertebral bodies (arrows).
This article reinvestigates the impact of the concavity of an agent's utility function on self-insurance and self-protection decisions when they are modeled in a two-period sense.
To precisely estimate the capability of the model, assumptions of convexity and concavity are checked with the help of Hessian matrix.
Section 4 discusses related econometric issues, paying explicit attention to the singularity problem and the imposition of global concavity. Section 5 discusses the data and Section 6 presents the empirical results for each of the residential, commercial, and industrial sectors.