# Human brain overview for biotech and artificial intelligence development (part 8)

M-theory, in physics, is a generalized theory of eleven-dimensional supergravity that attempts to unify the five superstring theories.

Generalized means made more general, less specialized.

General means including or involving every part or member of a given or implied entity, whole etc.; as opposed to specific or particular. General means not limited in use or application; applicable to the whole or every member of a class or category. General means not limited to a specific class; miscellaneous, concerned with all branches of a given subject or area.

Eleven-dimensional means possessing eleven geometric dimensions.

Geometric means of or relating to geometry.

Geometry is the branch of mathematics dealing with spatial relationships. Geometry is a mathematical system that deals with spatial relationships and that is built on a particular set of axioms; a subbranch of geometry which deals with such a system or systems. A geometry, in algebraic geometry, is a mathematical object comprising representations of a space and of its spatial relationships.

Algebraic geometry, in mathematics, is a branch of mathematics that studies algebraic varieties (solution sets of polynomial equations) and their generalisations, using techniques from both algebra (chiefly commutative algebra) and geometry.

An algebraic variety, in algebraic geometry, is the set of solutions of a given system of polynomial equations over the real or complex numbers; any of certain generalisations of such a set that preserves the geometric intuition implicit in the original definition. Synonym: (elliptical) variety.

Elliptical, in mathematics, means elliptic.

Elliptic, in mathematics, means of or pertaining to a broad field of mathematics that originates from the problem of calculating arc lengths of an ellipse. Elliptic, in mathematics, (in combination, of certain functions, equations and operators) that has coefficients satisfying a condition analogous to the condition for the general equation for a conic section to be of an ellipse.

An ellipse, in geometry, is a closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points (called the foci of the ellipse) is constant; equivalently, the conic section that is the intersection of a cone with a plane that does not intersect the base of the cone.

A locus, in mathematics, is the set of all points whose coordinates satisfy a given equation or condition. A locus, in genetics, is a fixed position on a chromosome that may be occupied by one or more genes.

A focus, in geometry, is a point of a conic at which rays reflected from a curve or surface converge.

Conic is synonym of conical.

Conical, in geometry, means of or relating to a cone or cones. Conical means shaped like a cone.

To converge is to approach each other; to get closer and closer. To converge, in mathematics, (said of a sequence or series) is to have a (finite, proper) limit.

A conic section, in geometry, is any of the four distinct shapes that are the intersections of a cone with a plane, namely the circle, ellipse, parabola and hyperbola.

A circle, in geometry, is a two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).

A parabola, in geometry, is the conic section formed by the intersection of a cone with a plane parallel to a tangent plane to the cone; the locus of points equidistant from a fixed point (the focus) and line (the directrix).

A directrix, in geometry, is a line used to define a curve or surface; especially a line, the distance from which a point on a conic has a constant ratio to that from the focus.

A hyperbola, in geometry, is a conic section formed by the intersection of a cone with a plane that intersects the base of the cone and is not tangent to the cone. The function y(x) = 1/x draws a hyperbola.

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