This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. An ornamental pin attached to clothing in a person's upper chest area.

n. A pin worn on the breast for a fastening, or for ornament; a brooch.

n. A pin worn on the breast for a fastening or for ornament; a brooch; a scarf-pin.

n. a decorative pin worn by women

"He wore no ornaments, except ear-rings, a plain breastpin, and one or two rings on the fingers."

pin   

sunburst   

brooch    broach   

cufflink    wrapare    dolman    Kelley    maniple    hanky-panky    stickpin    dickey    tiepin    effulgent