[ tak-sis ]
/ ˈtæk sɪs /
See synonyms for: taxis / taxes on

noun, plural tax·es [tak-seez]. /ˈtæk siz/.

arrangement or order, as in one of the physical sciences.
Biology. oriented movement of a motile organism in response to an external stimulus, as toward or away from light.
Surgery. the replacing of a displaced part, or the reducing of a hernia or the like, by manipulation without cutting.
Architecture. the adaptation to the purposes of a building of its various parts.



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Origin of taxis

1720–30; <New Latin <Greek táxis, equivalent to tak- (base of tássein to arrange, put in order) + -sis-sis

Definition for taxis (2 of 3)

[ tak-seez ]
/ ˈtæk siz /


a plural of taxi.

Definition for taxis (3 of 3)


a combining form representing taxis1 in compound words: heterotaxis.
Compare tax-, taxi-, taxo-, -taxy. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for taxis (1 of 2)

/ (ˈtæksɪs) /


the movement of a cell or organism in a particular direction in response to an external stimulus
surgery the repositioning of a displaced organ or part by manual manipulation only

Word Origin for taxis

C18: via New Latin from Greek: arrangement, from tassein to place in order

British Dictionary definitions for taxis (2 of 2)



n combining form

indicating movement towards or away from a specified stimulusthermotaxis
order or arrangementphyllotaxis

Derived forms of -taxis

-tactic or -taxic, adj combining form

Word Origin for -taxis

from New Latin, from Greek taxis order
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

Medical definitions for taxis (1 of 2)

[ tăksĭs ]

n. pl. tax•es (tăksēz)

The responsive movement of a free-moving organism or cell toward or away from an external stimulus, such as light.
The moving of a body part by manipulation into normal position, as after a dislocation.

Medical definitions for taxis (2 of 2)



Order; arrangement:stereotaxis.
Responsive movement; taxis:chemotaxis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.