unstable; unsteady.
Physics. having no tendency to take a definite position or direction.

Origin of astatic

1820–30; < Greek ástat(os) not steadfast, unstable (a- a-6 + statós standing) + -ic; see static
Related formsa·stat·i·cal·ly, adverba·stat·i·cism [ey-stat-uh-siz-uh m] /eɪˈstæt əˌsɪz əm/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for astatic

Historical Examples of astatic

British Dictionary definitions for astatic



not static; unstable
  1. having no tendency to assume any particular position or orientation
  2. (of a galvanometer) having two mutually compensating magnets arranged so that the instrument is independent of the earth's magnetic field
Derived Formsastatically, adverbastaticism, noun

Word Origin for astatic

C19: from Greek astatos unsteady; see a- 1, static
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for astatic

1827, from Greek astatos "unstable, not steadfast," from a-, privative prefix (see a- (3)), + statos "placed, standing," from PIE root *sta- (see stet).

Online Etymology Dictionary, © 2010 Douglas Harper

astatic in Medicine




Relating to astasia.
Unsteady; unstable.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.