A feature of the uṣṇīṣa whereby its top, or its upward extent, cannot be seen.

One of the features of a tathāgata, sometimes included as an additional characteristic of the uṣṇīṣa (q.v.) and sometimes as a separate sign, either within the major and minor marks or in addition to them. Although sometimes explained with the sense almost of a prohibition against looking down on a tathāgata from above, it is more usually linked to the idea that the uṣṇīṣa extends upwards so far that its top is literally out of sight. Its mention in this text relates to the overall stature of a tathāgata, presumably in more than one sense.