(astronomy) A galaxy having a number of arms of younger stars that spiral out from the centre containing older ones

A species of seaweed, Fucus spiralis, living on the Atlantic coasts of Europe and North America.

plural of spiral staircase

plural of spiral galaxy

plural of spiral arm

(astronomy) A section of a spiral galaxy that coils out from the centre.

(mathematics) A spiral that increases in distance from the point of origin at a constant rate.

(astronomy) a spiral-shaped nebula / (astronomy, obsolete) a spiral-shaped white nebula; these were generally determined to be spiral galaxies in the 20th century

A neo-pagan group dance emphasizing community and rebirth.

(aviation) The downward, corkscrew-motion of a disabled aircraft which is unrecoverably headed for a crash.