Manopavicāra: 'mental indulging'. There are mentioned 18 ways of indulging: 6 in gladness somanassūpavicāra in sorrow domanassa 6 in indifference upekkhā Perceiving with the eye a visible form... hearing with the ear a sound... being in mind conscious of an object, one indulges in the joy-producing object, the sorrow-producing object, the indifference-producing object... M. 137; A. III, 61. - In the Com. to A., upavicāra is said to be identical with vitakka-vicāra.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.