taxi-, tax-, taxo-, taxio-, -taxia, -taxis, -taxy, tact-, -tactic, -tactical, -tactics
(Greek: arrangement, order, put in order, orientation; the movements or directed responses of motile organisms to stimuli, as indicated by the combining roots)
zootaxis
Animal taxonomy.
The mutual attraction between male and female gametes: The shared affinity betwixt or between two suspensors which is instantly responsible for sexual union or conjugation.