n. 田芥菜

[医] 野芥

[ noun ]
weedy Eurasian plant often a pest in grain fields
<noun.plant>

Charlock \Char"lock\, n. [AS. cerlic; the latter part perh. fr.
AS. le['a]c leek. Cf. {Hemlock}.] (Bot.)
A cruciferous plant ({Brassica sinapistrum}) with yellow
flowers; wild mustard. It is troublesome in grain fields.
Called also {chardock}, {chardlock}, {chedlock}, and
{kedlock}.

{Jointed charlock}, {White charlock}, a troublesome weed
({Raphanus Raphanistrum}) with straw-colored, whitish, or
purplish flowers, and jointed pods: wild radish.

Harlock \Har"lock\ (h[aum]r"l[o^]k), n.
Probably a corruption either of {charlock} or {hardock}.
--Drayton.


Mustard \Mus"tard\, n. [OF. moustarde, F. moutarde, fr. L.
mustum must, -- mustard was prepared for use by being mixed
with must. See {Must}, n.]
1. (Bot.) The name of several cruciferous plants of the genus
{Brassica} (formerly {Sinapis}), as {white mustard}
({Brassica alba}), {black mustard} ({Brassica Nigra}),
{wild mustard} or {charlock} ({Brassica Sinapistrum}).

Note: There are also many herbs of the same family which are
called mustard, and have more or less of the flavor of
the true mustard; as, bowyer's mustard ({Lepidium
ruderale}); hedge mustard ({Sisymbrium officinale});
Mithridate mustard ({Thlaspi arvense}); tower mustard
({Arabis perfoliata}); treacle mustard ({Erysimum
cheiranthoides}).

2. A powder or a paste made from the seeds of black or white
mustard, used as a condiment and a rubefacient. Taken
internally it is stimulant and diuretic, and in large
doses is emetic.

{Mustard oil} (Chem.), a substance obtained from mustard, as
a transparent, volatile and intensely pungent oil. The
name is also extended to a number of analogous compounds
produced either naturally or artificially.