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Webster 1913 Edition

Noun.

(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.

Noun.

Hemp; in ridicule.

neckweed ‎(usually uncountable, plural neckweeds)

An American annual weed (Veronica peregrina), with small white flowers and a roundish pod.
(humorous, archaic) The hemp plant, which furnishes ropes for hanging criminals.
(Can we find and add a quotation of Dr. Prior to this entry?)

Veronica peregrina