A type of ākāśaśreṇi (Śreṇi (1) (the row of space-units));
that ākāśaśreṇi, through which the soul of a Sthāvara ]īva (living being incapable of undertaking locomotion), passes during Antarālagati (motion of the Jīva (soul) after death in the space)), (or a Pudgala (physical substance travels), when it enters into the Trasanāḍī (central cylindrical part of the cosmos, wherein the living beings capable of undertaking locomotion can inhabit) from any one side of it, taking a turn, moves upwards or downwards in it and again taking a turn towards the same side, emerges out of the Trasanāḍī and reaches the destination; it may take two or three turns; it is called Ekataḥkhā, because it touches the space outside the Trasanāḍī only on one side. In this kind of Śreṇi, there is the motion with turns like that of Ekatovakrā (the Śreṇi with one turn), Dvitovakrā (the Śreṇi with two turns), but its structure is different from them, on account of the involvement of Trasanāḍī.
'egaokhah' tti yayā jīvaḥ pudgalo vā nāḍyā vāmapārśvādestāṃ praviṣṭastayaiva gatvā punastadvāmapārśvādāvntpadyate sā ekataḥ khā, ekasyāṃ diśi vāmādipārśvalaksanasya bhāvāditi, iyaṃ ca dvitricaturvakropetā'pi kṣetraviśeṣāśriteti bhedonoktāḥ, sthāpanā ceyam.
(Bhaga 25.91 Vṛ Pa 868)