n. 衬裙, 裙子

[ noun ]
undergarment worn under a skirt
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Petticoat \Pet"ti*coat\, n. (Zo["o]l.) [Petty + coat.]
A loose under-garment worn by women, and covering the body
below the waist.

{Petticoat government}, government by women, whether in
politics or domestic affairs. [Colloq.]

{Petticoat pipe} (Locomotives), a short, flaring pipe
surrounding the blast nozzle in the smoke box, to equalize
the draft.