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In a spiral form, manner, or direction.

Of a flower, having its parts inserted spirally on the receptacle.

shall be equal to each other. -- Spiral axis (Arch.), the axis of a twisted column drawn spirally in order to trace the circumvolutions without. -- Axis of abscissas and Axis of ordinates. See Abscissa.

To wind cylindrically or spirally; as, to coil a rope when not in use; the snake coiled itself before springing.

To revolve round a central point; to move spirally about an axis, as a tornado; to revolve.

Moving in a circle, or spirally; revolving; whirling around.

Having the planes arranged spirally, so that they incline all to the right (or left) of a vertical line; -- said of certain hemihedral forms.

Rolled inward spirally.

a, having a thin, flat, round shell, containing a large number of small chambers arranged spirally.

-- Persian drill (Mech.), a drill which is turned by pushing a nut back and forth along a spirally grooved drill holder. -- Persian fire (Med.), malignant pustule. -- Persian powder. See Insect powder, under Insect. -- Persian red. See Indian red (a), under Indian. -- Persian wheel, a noria; a tympanum. See Noria.…

Any myriapod of the genus Iulus and allied genera which rolls up spirally; a galleyworm. See Illust. under Myriapod.

ight-handed screw, a screw, the threads of which, like those of a common wood screw, wind spirally in such a direction that screw advances away from the observer when turned with a right-handed movement in a fixed nut.

To rise in the air spirally.

r a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove, between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the thr…

They secrete a calcareous tube, which is usually irregularly contorted, but is sometimes spirally coiled. The worm has a wreath of plumelike and often bright-colored gills around its head, and usually an operculum to close the aperture of its tube when it retracts.

Rising spirally from right to left (of the spectator); sinistrorse.

A spiral cam, or a flat piece of metal of spirally curved outline, used for giving motion to, or changing the position of, another part, as the hammer tail of a striking clock.

To wind round spirally, as a large rope with a smaller, or with cord, the small rope lying in the spaces between the strands of the large one; to worm.

Having spines arranged spirally. See Spicule.

Having the color spots, or structural parts, arranged spirally.