n.
(墨西哥大戟属树的种子,蛾的幼虫多寄生其中,故能跳动)跳豆

[ noun ]
seed of Mexican shrubs of the genus Sebastiana containing the larva of a moth whose movements cause the bean to jerk or tumble
<noun.plant>

Jumping \Jump"ing\, p. a. & vb. n.
of {Jump}, to leap.

{Jumping bean}, a seed of a Mexican {Euphorbia}, containing
the larva of a moth ({Carpocapsa saltitans}). The larva by
its sudden movements causes the seed to roll to roll and
jump about.

{Jumping deer} (Zo["o]l.), a South African rodent ({Pedetes
Caffer}), allied to the jerboa.

{Jumping louse} (Zo["o]l.), any of the numerous species of
plant lice belonging to the family {Psyllid[ae]}, several
of which are injurious to fruit trees.

{Jumping mouse} (Zo["o]l.), North American mouse ({Zapus
Hudsonius}), having a long tail and large hind legs. It is
noted for its jumping powers. Called also {kangaroo
mouse}.

{Jumping mullet} (Zo["o]l.), gray mullet.

{Jumping shrew} (Zo["o]l.), any African insectivore of the
genus {Macroscelides}. They are allied to the shrews, but
have large hind legs adapted for jumping.

{Jumping spider} (Zo["o]l.), spider of the genus {Salticus}
and other related genera; one of the Saltigrad[ae]; -- so
called because it leaps upon its prey.