n. 瓢虫

[ noun ]
small round bright-colored and spotted beetle that usually feeds on aphids and other insect pests
<noun.animal>

Ladybird \La"dy*bird`\, n. [Equiv. to, bird of Our Lady.]
(Zo["o]l.)
Any one of numerous species of small beetles of the genus
{Coccinella} and allied genera (family {Coccinellid[ae]}); --
called also {ladybug}, {ladyclock}, {lady cow}, {lady fly},
{ladybeetle}, and {lady beetle}. {Coccinella seplempunctata}
in one of the common European species. See {Coccinella}.

Note: The ladybirds are usually more or less hemispherical in
form, with a smooth, polished surface, and often
colored red, brown, or black, with small spots of
brighter colors. Both the larv[ae] and the adult
beetles of most species feed on aphids, and for this
reason they are very beneficial to agriculture and
horticulture.