Hypertext Webster Gateway: "jalap"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Jalap \Jal"ap\, n. [F., fr. Sp. jalapa; -- so called from
Jalapa, a town in Mexico, whence it was first obtained.]
(Med.)
The tubers of the Mexican plant {Ipom[oe]a purga} (or
{Exogonium purga}), a climber much like the morning-glory.
The abstract, extract, and powder, prepared from the tubers,
are well known purgative medicines. Other species of
Ipom[oe]a yield several inferior kinds of jalap, as the {I.
Orizabensis}, and {I. tuberosa}.
{False jalap}, the root of {Mirabilis Jalapa}, four-o'clock,
or marvel of Peru.
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