'Neckweed' definitions:

Definition of 'Neckweed'

From: GCIDE

Neckweed \Neck"weed`\, n. (Bot.) (a) An American annual weed (veronica peregrina), with small white flowers and a roundish pod. (b) The hemp; -- so called as furnishing ropes for hanging criminals. --Dr. Prior. [1913 Webster]