**Equiangular spiral** — Spiral Spi ral, n. [Cf. F. spirale. See {Spiral}, a.] 1. (Geom.) A plane curve, not re[ e]ntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed … The Collaborative International Dictionary of English

**equiangular spiral** — noun : a plane curve that cuts all its radii vectores at the same angle called also logarithmic spiral … Useful english dictionary

**Equiangular** — E qui*an gu*lar, a. [Equi + angular. Cf. {Equangular}.] Having equal angles; as, an equiangular figure; a square is equiangular. [1913 Webster] {Equiangular spiral}. (Math.) See under {Spiral}, n. {Mutually equiangular}, applied to two figures,… … The Collaborative International Dictionary of English

**Spiral** — Spi ral, n. [Cf. F. spirale. See {Spiral}, a.] 1. (Geom.) A plane curve, not re[ e]ntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed point… … The Collaborative International Dictionary of English

**Spiral of Archimedes** — Spiral Spi ral, n. [Cf. F. spirale. See {Spiral}, a.] 1. (Geom.) A plane curve, not re[ e]ntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed … The Collaborative International Dictionary of English

**Equiangular** — In geometry equiangular relates to having equal angles. In particular: *Equiangular polygon a polygon with equal angles. *The Logarithmic spiral or equiangular spiral a type of spiral. *Equiangular lines a set of lines where every pair of lines… … Wikipedia

**spiral** — spirality /spuy ral i tee/, n. spirally, adv. /spuy reuhl/, n., adj., v., spiraled, spiraling or (esp. Brit.) spiralled, spiralling. n. 1. Geom. a plane curve generated by a point moving around a fixed point while constantly receding from or… … Universalium

**Mutually equiangular** — Equiangular E qui*an gu*lar, a. [Equi + angular. Cf. {Equangular}.] Having equal angles; as, an equiangular figure; a square is equiangular. [1913 Webster] {Equiangular spiral}. (Math.) See under {Spiral}, n. {Mutually equiangular}, applied to… … The Collaborative International Dictionary of English

**Logarithmic spiral** — Spiral Spi ral, n. [Cf. F. spirale. See {Spiral}, a.] 1. (Geom.) A plane curve, not re[ e]ntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed … The Collaborative International Dictionary of English

**Logarithmic spiral** — A logarithmic spiral, equiangular spiral or growth spiral is a special kind of spiral curve which often appears in nature. The logarithmic spiral was first described by Descartes and later extensively investigated by Jakob Bernoulli, who called… … Wikipedia