(tak′sis) noun
1. Surg. A methodical application of manual pressure, as on a hernial tumor, for restoring the parts to their normal place.
2. Zool. The involuntary movement of an organism or cell, as a zoospore, in response to an external stimulus; specifically, a movement involving locomotion or change of place. Compare TROPISM.
3. In ancient Greece, a body of troops of varying size.
4. Obs. Order; arrangement, as of words in a sentence. [<Gk., arrangement <tassein arrange]

Order; disposition; arrangement: thermotaxis. Also spelled -taxy. [<Gk. taxis arrangement]