Wordnet 3.0
NOUN (1)
1.
North American annual with small white flowers widely naturalized as a weed in South America and Europe;
[syn: purslane speedwell, Veronica peregrina]
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
Veronica peregrina
n 1: North American annual with small white flowers widely
naturalized as a weed in South America and Europe [syn:
purslane speedwell, Veronica peregrina]