poematium

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

pŏēmătĭum, ĭi, n., = ποιημάτιον,

a little or short poem (post-Aug.), Plin. Ep. 4, 14; so id. ib. 4, 27; Aus. Idyll. 7.