The Collaborative International Dictionary
Autoschediastic
Autoschediastic \Au`to*sche`di*as"tic\
([add]`t[-o]*sk[=e]`d[i^]*[a^]s"t[i^]k), Autoschediastical
\Au`to*sche`di*as"tic*al\ (-[a^]s"t[i^]*kal), a. [Auto- + Gr.
schedia`zein to do hastily. See Schediasm.]
Extemporary; offhand. [R.]
--Dean Martin.
Wiktionary
autoschediastic
a. (context dated English) impromptu, ex tempore or offhand