渦 - whirlpool, eddy, vortex

whirlpool; maelstrom; vortex; eddy; swirl

vortex; maelstrom; whirlpool

whirlpool; swirl; eddy; vortex; maelstrom

Xenoturbellidae (family of worm-like basal deuterostomes)

vortex filament; vortex line

spiral nebula

cyclonic thunder-storm

centrifugal pump

cold vortex

spiral galaxy

Xenoturbellida (phylum of worm-like basal deuterostomes)

spiral-wound gasket; spiral gasket