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The Collaborative International Dictionary of English v.0.48 (gcide)

Ladybird \La"dy*bird`\, n. [Equiv. to, bird of Our Lady.]
(Zool.)
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}.
[1913 Webster]

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 larvae and the adult beetles
of most species feed on aphids, and for this reason
they are very beneficial to agriculture and
horticulture.
[1913 Webster]