The spiralling motion of water caused by Langmuir circulation.

plural of spiral ganglion

(neuroanatomy) A mass of bipolar cell bodies occurring in the modiolus of the organ of Corti and giving off axons which comprise the cochlear nerve.

(aviation, military) A last-resort defensive maneuver in dogfighting used by an aircraft with critically-low kinetic energy, consisting of a rolling scissors performed straight down, using gravity to supply the kinetic energy needed to continue maneuvering, while attempting to either slow down enough to get behind the attacker or else trick the attacker into crashing into the ground.

plural of spiral worm

(astronomy) a spiral galaxy with discontinuous spiral arms

plural of barred spiral galaxy

(astronomy) A spiral galaxy with a central bar-shaped structure composed of stars.

Helicotylenchus dihystera, a nematode that is a plant pathogen.

(astronomy) a type of supergiant spiral galaxy of the local universe that is much larger than most giant spiral galaxies, and whose stellar creation rate is much higher than typical spiral galaxies because it is more luminous