What does "dagger" mean?

Dagger: (Print.) A mark of reference in the form of a dagger [|]. It is the second in order when more than one reference occurs on a page; -- called also obelisk. Dagger moth (Zoöl.), any moth of the genus Apatalea. The larvæ are often destructive to the foliage of fruit trees, etc. -- Dagger of lath, the wooden weapon given to the Vice in the old Moralities. Shak. -- Double dagger, a mark of reference [||] which comes next in order after the dagger. -- To look, or speak, daggers, to look or speak fiercely or reproachfully.