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Glossary of Math Terms
beginning with letter H
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haversine Tweet Definition of haversine Like Definition of haversine on Facebook
  1. (trigonometry) The haversed sine.
Heaviside unit function Tweet Definition of Heaviside unit function Like Definition of Heaviside unit function on Facebook
  1. (mathematics) The function whose value is zero if its independent variable is negative, and one otherwise
helical Tweet Definition of helical Like Definition of helical on Facebook
  1. in the shape of a helix
helices Tweet Definition of helices Like Definition of helices on Facebook
  1. (plural of, helix)
helix Tweet Definition of helix Like Definition of helix on Facebook
noun (helixes, pl2=helices)
  1. (mathematics) A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase.
  2. (architecture) A small volute under the abacus of a Corinthian capital.
  3. (anatomy) The incurved rim of the external ear.
proper noun Helix
  1. (zoology) A genus of land snail containing many species.
hemisphere Tweet Definition of hemisphere Like Definition of hemisphere on Facebook
  1. (geometry) A half-sphere, formed by a plane intersecting the center of a sphere.
  2. (geography) Half of the Earth, the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere.
  3. (anatomy) Either of the two halves of the cerebrum.
hendecagon Tweet Definition of hendecagon Like Definition of hendecagon on Facebook
noun (plural hendecagons)
  1. (geometry) A polygon with eleven sides and eleven angles.
heptad Tweet Definition of heptad Like Definition of heptad on Facebook
  1. a group of seven things
heptagon Tweet Definition of heptagon Like Definition of heptagon on Facebook
noun (plural: heptagons)
  1. (geometry) A polygon with seven sides and seven angles.
heptagonal Tweet Definition of heptagonal Like Definition of heptagonal on Facebook
  1. Having seven angles and sides.
heptahedron Tweet Definition of heptahedron Like Definition of heptahedron on Facebook
noun (plural=heptahedra or heptahedrons)
  1. (mathematics) any polyhedron having seven faces
hex Tweet Definition of hex Like Definition of hex on Facebook
noun (hexes)
  1. An evil spell or curse.
  2. A witch.
verb (hexes, hexing, hexed)
  1. To put a hex on.
hexad Tweet Definition of hexad Like Definition of hexad on Facebook
  1. A group of six.
hexagon Tweet Definition of hexagon Like Definition of hexagon on Facebook
  1. (geometry) A polygon with six sides and six angles.
hexagonal Tweet Definition of hexagonal Like Definition of hexagonal on Facebook
  1. (geometry) Having six edges, or having a cross-section in the form of a hexagon.
    Nuts in engineering are generally hexagonal.
    1. (crystallography) Having three equal axis which cross at 60° angles, and an unequal axis which crosses the others at 90° angle.
hexagram Tweet Definition of hexagram Like Definition of hexagram on Facebook
  1. A hollow six-pointed star formed by overlapping two equilateral triangles; the Star of David.
  2. Any of the 64 sets of solid and broken lines used for divination in the I Ching.
  3. A large silver coin minted during the Byzantine, Byzantine Empire.
hexahedron Tweet Definition of hexahedron Like Definition of hexahedron on Facebook
noun (pl2=hexahedra)
  1. (geometry) A polyhedron with six faces; the regular hexahedron is more commonly called the cube and is one of the Platonic solids.
Hilbert space Tweet Definition of Hilbert space Like Definition of Hilbert space on Facebook
  1. (mathematics) A generalized Euclidean space in which mathematical functions take the place of points; crucial to the understanding of quantum mechanics and other applications.
homothetic Tweet Definition of homothetic Like Definition of homothetic on Facebook
  1. (mathematics) of a function of two or more variables in which the ratio of the partial derivatives depends only on the ratio of the variables, not their value
  2. (economics) in which the ratio of goods demanded depends only on the ratio of their prices
  3. the relationship of a microcosm to a macrocosm
hundred Tweet Definition of hundred Like Definition of hundred on Facebook
noun (plural hundreds)
  1. A hundred-dollar bill.
  2. (historical) An administrative subdivision in southern English counties and other countries.
  3. (cricket) a hundred runs scored by a batsman
He made a in the historic match.
hundredth Tweet Definition of hundredth Like Definition of hundredth on Facebook
  1. The person or thing in the hundredth position.
  2. One of a hundred equal parts of a whole. Called also percent.
  1. The ordinal form of the number hundred, one hundred.
hyperbolic function Tweet Definition of hyperbolic function Like Definition of hyperbolic function on Facebook
  1. (mathematics) A function that is derived from some arithmetic operations on the exponential function with base e and the inverse function, and was named after the corresponding similar trigonometric function.
hypergeometric distribution Tweet Definition of hypergeometric distribution Like Definition of hypergeometric distribution on Facebook
  1. (probability theory) A discrete probability distribution that describes the number of successes in a sequence of n draws from a finite population without replacement.
hypergeometric function Tweet Definition of hypergeometric function Like Definition of hypergeometric function on Facebook
  1. (mathematics) Any function that is a solution of the hypergeometric equation; usually an expansion of an infinite series
hyperspace Tweet Definition of hyperspace Like Definition of hyperspace on Facebook
  1. (math) An n-dimensional Euclidian space with n > 3.
  2. (math) A Euclidian space of unspecified dimension.
  3. (scifi) A notional space orthogonal to the usual dimensions of space-time often used for faster-than-light travel.
We can only get to the Nimrodian Galaxy if we go through .
  1. (Video games): A means of teleporting one's character.
I was totally surrounded, so I had to hit .
hypersphere Tweet Definition of hypersphere Like Definition of hypersphere on Facebook
  1. (geometry) The set of all points in a given hyperspace that are at a given distance from a given point.
hypersurface Tweet Definition of hypersurface Like Definition of hypersurface on Facebook
  1. (mathematics) A -dimensional surface in a space (often a Euclidean space) of dimension +1
hypocycloid Tweet Definition of hypocycloid Like Definition of hypocycloid on Facebook
noun (plural hypocycloids)
  1. (geometry) The locus of a point on the circumference of a circle that rolls without slipping inside the circumference of another circle.
hypotenuse Tweet Definition of hypotenuse Like Definition of hypotenuse on Facebook
  1. (geometry) The side of a right triangle opposite the right angle.

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