Lewis Short
pastÄnum (noun N) :
* A kind of two-pronged dibble, for preparing the ground and for setting plants with: pastinum vocant agricolae ferramentum bifurcum, quo semina panguntur. Col. 3, 18. 1, and 6.
* Transf.
* The act of digging up and trenching the ground: pastinum fieri nunc tempus est,Pall. 2, 10, 1.
* In plur., ground so prepared: sed haec in pastinis vel sulcis ratio erit,Pall. 3, 9, 13: latitudo pastinorum,id. 1, 7, 2; 1, 34, 2: instituere,Dig. 24, 3, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary