noun
logarithmic spiral; equiangular spiral
A mathematical curve whose tangent makes a constant angle with the radius vector. Used in geometry and natural forms.
対数螺線は、貝殻の形など自然界にも見られる。
Logarithmic spirals can be seen in nature, such as in the shape of shells.
Archimedean spiral: distance from the center increases linearly with angle, unlike the logarithmic spiral where it grows exponentially.
Compound of 対数 (logarithm) and 螺線 (spiral). The term directly describes the mathematical property of the curve.