manipulandum

noun

ma·​nip·​u·​lan·​dum

məˌnipyəˈlandəm

plural manipulanda

-də

psychology

: something that is or is to be manipulated

the instigator and manipulandum of behavior, the matrix within which all action must be described

—R. R. Sears

Word History

Etymology

New Latin, from English manipulate + Latin -andum (neuter of -andus, 1st conjunction gerundive ending)

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