from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Unsteady; unstable.
- adj. Physics Having no particular directional characteristics.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not static or stable; unsteady, unstable
- adj. Of or pertaining to astasia
from the GNU version of the Collaborative International Dictionary of English
- adj. Having little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction.
from The Century Dictionary and Cyclopedia
- Unstable; unsteady.
- Hence In physical, having no tendency to take a definite (fixed) position; without directive power: used especially of a magnetic needle whose directive property has been neutralized.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not static or stable
Quartz fibres have two great advantages over other forms of suspension when employed for any kind of torsion balance, from an ordinary more or less "astatic" galvanometer to the Cavendish apparatus.
There is much worry and misery in the world because so many are astatic, like a compass that has lost its loadstone.
The loafing or astatic mind will fall into morbid tendencies.
This magnet is capable of rendering the needle less sensitive or of making it astatic.
Horizontal and vertical astatic system are also used -- Figs. 18, 18a.
The most convenient way will be to use two coils, one on each side of the astatic needle.
Hang the astatic needle so that the wire between the two parts will not quite touch the coil.
For a description of the wood-work, coil, etc., see App. 112; for the astatic needle see App. 69; for the method of supporting the needle see App. 113, Fig. 86.
By this the astatic needle is suspended and protected from air currents.
This coil, etc., may be used in connection with an astatic needle.