| haversine |
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noun - (trigonometry) The haversed sine.
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| Heaviside unit function |
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noun - (mathematics) The function whose value is zero if its independent variable is negative, and one otherwise
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| helical |
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adjective - in the shape of a helix
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| helices |
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noun
- (plural of, helix)
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| helix |
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noun (helixes, pl2=helices)
- (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.
- (architecture) A small volute under the abacus of a Corinthian capital.
- (anatomy) The incurved rim of the external ear.
proper noun Helix
- (zoology) A genus of land snail containing many species.
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| hemisphere |
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noun
- (geometry) A half-sphere, formed by a plane intersecting the center of a sphere.
- (geography) Half of the Earth, the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere.
- (anatomy) Either of the two halves of the cerebrum.
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| hendecagon |
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noun (plural hendecagons)
- (geometry) A polygon with eleven sides and eleven angles.
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| heptad |
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noun
- a group of seven things
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| heptagon |
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noun (plural: heptagons)
- (geometry) A polygon with seven sides and seven angles.
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| heptagonal |
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adjective
- Having seven angles and sides.
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| heptahedron |
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noun (plural=heptahedra or heptahedrons)
- (mathematics) any polyhedron having seven faces
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| hex |
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noun (hexes)
- An evil spell or curse.
- A witch.
verb (hexes, hexing, hexed)
- To put a hex on.
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| hexad |
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noun
- A group of six.
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| hexagon |
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noun
- (geometry) A polygon with six sides and six angles.
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| hexagonal |
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adjective - (geometry) Having six edges, or having a cross-section in the form of a hexagon.
- Nuts in engineering are generally hexagonal.
- (crystallography) Having three equal axis which cross at 60° angles, and an unequal axis which crosses the others at 90° angle.
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| hexagram |
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noun
- A hollow six-pointed star formed by overlapping two equilateral triangles; the Star of David.
- Any of the 64 sets of solid and broken lines used for divination in the I Ching.
- A large silver coin minted during the Byzantine, Byzantine Empire.
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| hexahedron |
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noun (pl2=hexahedra)
- (geometry) A polyhedron with six faces; the regular hexahedron is more commonly called the cube and is one of the Platonic solids.
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| Hilbert space |
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noun
- (mathematics) A generalized Euclidean space in which mathematical functions take the place of points; crucial to the understanding of quantum mechanics and other applications.
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| homothetic |
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adjective
- (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
- (economics) in which the ratio of goods demanded depends only on the ratio of their prices
- the relationship of a microcosm to a macrocosm
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| hundred |
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noun (plural hundreds)
- A hundred-dollar bill.
- (historical) An administrative subdivision in southern English counties and other countries.
- (cricket) a hundred runs scored by a batsman
- He made a in the historic match.
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| hundredth |
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noun
- The person or thing in the hundredth position.
- One of a hundred equal parts of a whole. Called also percent.
adjective
- The ordinal form of the number hundred, one hundred.
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| hyperbolic function |
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noun
- (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.
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| hypergeometric distribution |
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noun
- (probability theory) A discrete probability distribution that describes the number of successes in a sequence of n draws from a finite population without replacement.
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| hypergeometric function |
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noun - (mathematics) Any function that is a solution of the hypergeometric equation; usually an expansion of an infinite series
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| hyperspace |
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noun
- (math) An n-dimensional Euclidian space with n > 3.
- (math) A Euclidian space of unspecified dimension.
- (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 .
- (Video games): A means of teleporting one's character.
- I was totally surrounded, so I had to hit .
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| hypersphere |
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noun
- (geometry) The set of all points in a given hyperspace that are at a given distance from a given point.
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| hypersurface |
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noun - (mathematics) A -dimensional surface in a space (often a Euclidean space) of dimension +1
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| hypocycloid |
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noun (plural hypocycloids)
- (geometry) The locus of a point on the circumference of a circle that rolls without slipping inside the circumference of another circle.
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| hypotenuse |
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noun
- (geometry) The side of a right triangle opposite the right angle.
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