三種之極少者。如一極微為物質之極少，一字為名之極少，一剎那為時之極少。俱舍論十二曰：「極微字剎那色名時極少。」
The three smallest things, i. e. an atom as the smallest particle of matter; a letter as the shortest possible name; a kṣaṇa, as the shortest period of time.
一三極少 指物質、名稱、時間等三種之極少。即：一極微為物質之極少，一字為諸名之極少，一剎那為時間之極少。〔俱舍論卷十二〕p859