Also found in: Medical, Wikipedia.
The movement exhibited by magnetite-containing bacteria that orient themselves along the lines of the earth's magnetic field.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
mag•ne•to•tax•is(mægˌni toʊˈtæk sɪs)
movement or orientation of an organism in response to a magnetic field.
mag•ne`to•tac′tic (-ˈtæk tɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.