cir·cum·duc·tion 
(sûr′kəm-dŭkshən)
(sûr′kəm-dŭkshən)n.
The circular movement of a limb such that the distal end of the limb delineates an arc.
[Latin circumductiō, circumductiōn-, act of leading around, from circumductus, past participle of circumdūcere, to lead around : circum-, circum- + dūcere, to lead; see deuk- in the Appendix of Indo-European roots.]