internal energy
energy contained in a system, excluding energy due to its position as a body in external force fields or its overall motion
en-US/ɪnˈtɝnəl ˈɛnɚd͡ʒi/
en-GB/ɪnˈtɜːnl ˈɛnəd͡ʒɪ/
energy contained in a system, excluding energy due to its position as a body in external force fields or its overall motion