feature nail

(名詞) 特色指甲:有擦指甲油、上色或彩繪而其他指甲不同的指甲。

When it comes to killer nails, Lady Gaga's latest manicure could actually do some damage. The pop star stepped out with a huge sharpened talon on her finger on Saturday morning. The five-inch feature nail looked seriously scary, as she flashed it at photographers.
—Chelsea White, "Monster manicure! Lady Gaga rocks claw-like nails with a super-long talon as she steps out in structural mini-dress," Daily Mail, December 15, 2012

Commonly known as the "feature nail," this trend is far from over, thanks to the ever-increasing interest in nail art. The fashion world has been taking nails and nail art very seriously in the past few years, as seen on international designer runways. The trend of painting, patterning and/or embellishing one nail differently is now being embraced both by celebrities and by the mainstream.
—Bahar Niramwalla, "What's a 'feature nail' and how do I wear it?," The Globe and Mail, April 13, 2013