# concavity

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**concavity**— noun 1. a shape that curves or bends inward • Syn: ↑concave shape, ↑incurvation, ↑incurvature • Derivationally related forms: ↑incurvate (for: ↑incurvation), ↑concave …22

**concave, concavity**— To be concave is to have a surface or boundary that curves or bulges inward, as does the inner surface of a hemisphere. Concavity is the state of being concave. (A tip to assist in remembering: caves and cavities go in, while convexities go… …23

**Concavities**— Concavity Con*cav i*ty, n.; pl. {Concavities}. [L. concavitas: cf. F. concavit[ e]. See {Concave}.] A concave surface, or the space bounded by it; the state of being concave. [1913 Webster] …24

**Bucket argument**— Isaac Newton s rotating bucket argument (also known as Newton s bucket ) was designed to demonstrate that true rotational motion cannot be defined as the relative rotation of the body with respect to the immediately surrounding bodies. It is one… …25

**Stationary point**— Not to be confused with a fixed point where x = f(x). Stationary points (red pluses) and inflection points (green circles). The stationary points in this graph are all relative maxima or relative minima. In mathematics, particularly in calculus,… …26

**Second derivative test**— In calculus, a branch of mathematics, the second derivative test is a criterion often useful for determining whether a given stationary point of a function is a local maximum or a local minimum.The test states: If the function f is twice… …27

**Curve orientation**— In mathematics, a positively oriented curve is a planar simple closed curve (that is, a curve in the plane whose starting point is also the end point and which has no other self intersections) such that when traveling on it one always has the… …28

**depression**— I (New American Roget s College Thesaurus) I n. recession, slowdown. II Pressing downward Nouns 1. depression, lowering; dip (see concavity); abasement, debasement; reduction. 2. overthrow, overset, overturn; upset; prostration, subversion,… …29

**Horse hoof**— A horse hoof is a structure surrounding the distal phalanx of the 3rd digit (digit III of the basic pentadactyl limb of vertebrates, evolved into a single weight bearing digit in equids) of each of the four limbs of Equus species, which is… …30

**hollow**— A concavity or depression. Sebileau h. depression between the inferior aspect of the tongue and the sublingual glands. * * * hol·low häl (.)ō, ə( w) n a depressed part of a surface or a concavity …