'autoschediastically' originates from Greek, specifically the word 'autoschediastikos', where 'autos-' meant 'self' and 'schediastikos' related to 'schedia' meaning 'something improvised' or 'an extemporaneous plan'.

'autoschediastikos' passed into scholarly New Latin/Modern technical usage (as 'autoschediastical'/'autoschediastic') and was later used in English as the adverb 'autoschediastically'.

Initially, it meant 'in a manner pertaining to improvisation or extemporaneous action', and this core meaning has largely remained the same in modern usage.