%premorse%

a. [ L. praemorsus, p. p. of praemordere to bite off; prae before + mordere to bite. ] Terminated abruptly, or as it bitten off. [ 1913 Webster ]

Premorse root or
Premorse leaves (Bot.), such as have an abrupt, ragged, and irregular termination, as if bitten off short. [ 1913 Webster ]