Kārmaṇa body (karmaśarīra)- A type of body the subtle most body which is formed by Karma-pudgalas (material clusters qua Karma), which m turn, becomes substratum of accumulation of Karmas.
karmaṇā nivṛttaṃ kārmaṇam, aśeṣakarmarāśerādhārabhūtaṃ kuṇḍavad.
(TaBhā 2.3 7 Vṛ)