in·stru·men·ta·tion 
(ĭn′strə-mĕn-tāshən)
(ĭn′strə-mĕn-tāshən)n.
1. The application or use of instruments.
2. Music
a. The study and practice of arranging music for instruments.
b. The arrangement or orchestration resulting from such practice.
c. A list of instruments used in an orchestration.
3.
a. The study, development, and manufacture of instruments, as for scientific or industrial use.
b. Instruments for a specific purpose.
4. Instrumentality.