(名詞) 手機平板電腦:將智慧型手機 (smartphone) 和 平板 (tablet) 電腦之功能結合在一起的裝置。這個字是由 phone + tablet 拼綴而成。

當然了,您也可以把這種裝置叫做「平板手機」,那麼它的英文就是 tabletphone

This phone-tablet hybrid ("phablet"?) is meant to cater to those who want a bit of functionality from both camps. On one hand, you can make phone calls and access email, yet its supersized screen means you don't need to squint to read e-books, watch video, play games or browse the web.
—Marc Saltzman, "Samsung Galaxy Note: Half smartphone, half tablet, all awesome (watch out iPhone, BlackBerry)," Toronto Star, February 3, 2012

Samsung's Galaxy Note is coming to the U.S. on AT&T on February 19, and the "phablet"—that's part phone, part tablet—has already sold more than a million units worldwide.
—Sascha Segan, "Enter the Phablet: A History of Phone-Tablet Hybrids," February 13, 2012