1. (a.) Winding or circling round a center or pole and gradually receding from it; as, the spiral curve of a watch spring.

2. (a.) Winding round a cylinder or imaginary axis, and at the same time rising or advancing forward; winding like the thread of a screw; helical.

3. (a.) of or pertaining to a spiral; like a spiral.

4. (n.) A plane curve, not reentrant, 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 called the pole. Cf. Helix.

5. (a.) Anything which has a spiral form, as a spiral shell.

Milky Way O-shaped Via Lactea acrobatics aerobatics ambagious anfractuous arise ascend aspire backhanded bank banking barred spiral barred spiral galaxy become airborne chandelle circle circling circuit circuiteer circuition circuitous circuitousness circuitry circular circularity circulate circulation circumambience circumambiency circumambulate circumambulation circumflexion circumlocution circummigrate circummigration circumnavigate circumnavigation circumvent cirrus claw skyward close the circle cochlear cochleate coil coiled come full circle come up compass corkscrew corkscrewy cosmic noise crab crabbing curl curl upwards curlicue cycle describe a circle deviance deviancy deviating deviation deviative devious deviousness digression digressive dip discursive dive diving encircle encompass entwine evolute excursion excursive excursus feather fishtail fishtailing flank float fly fly aloft gain altitude galactic circle galactic cluster galactic coordinates galactic latitude galactic longitude galactic nebula galactic noise galactic pole galaxy girdle girdle the globe glide go about go around go round go the round go up grow up gyre gyring hang helical helicoid helix hover indirect indirection involute island universe kink kite lap leave the ground levitate loom loop make a circuit meandering mount nose dive oblique orbit orbital orbiting out-of-the-way plane plow poise porpoise power dive pull out pull up pull-up pullout push down pushdown rear rear up revolve ringlet rise rise up roll rolling rotary round roundabout roundaboutness rounding screw screw-shaped scroll scrolled sideslip skid skirt soar spheroidal galaxy spin spiral galaxy spiral nebula spiraling spire spiroid stall stand up stunt stunting supergalaxy surge surround swarm up sweep up swirl tactical maneuvers take off tendril tower turbinal turbinate turn turning twine twirl twist undulate up upgo upgrow upheave uprise upspin upstream upsurge upswarm upwind verticillate volplane volute voluted volution vortex wheel wheeling whirl whorl whorled wreathe yaw zoom