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First recorded in 1835–45; from Greek ���ܳٴDz�������í��������, derivative, with -(s)ma noun suffix, of ���ܳٴDz������徱á���𾱲� “to extemporize,” verbal derivative of ���ܳٴDz�����é�徱�Dz� “hand-to-hand, offhand, improvised,” equivalent to auto- auto- ¹ + ������é�徱�Dz� “near, casual, offhand,” derivative of ��������ó�� (adverb) “near, close by,” akin to é����𾱲� “to hold, possess”