Noun
waterdrop (plural waterdrops)
A single drop of water.
The Galaxy M31, on the other hand, has a 6.4-inch full-HD+ Super AMOLED Infinity-U Display, which is commonly known as a display with waterdrop notch. Source: Internet
It is almost bezel-less with a waterdrop notch housing the selfie camera, and that gives ample display area on the screen. Source: Internet