Ultimate atom- The fundamental substance in the form of Pudgala (physical substance), which is further indivisible and which is possessed of one type of colour, one type of smell, one type of taste and two types of touch.
jaṃ davvaṃ avibhāgī, taṃ paramāṇu vijāṇīhi.
(TaVā 5.25)
paramāṇupoggale......egavaṇṇe, egagaṃdhe, egarase, duphāse paṇṇatte...
(Bhaga 18.111)
See Dravyaparamāṇu.