Is there a word for the spot between the two eyebrows?

The relevant anatomical term is glabella, defined by Oxforddictionaries.com as

The smooth part of the forehead above and between the eyebrows.

(The plural of glabella is glabellae, though I can't think of many situations where I might have to use it.)

According to Wikipedia,

A bindi (Hindi: बिंदी, from Sanskrit bindu, meaning "a drop, small particle, dot") [...] is a forehead decoration worn in South Asia (particularly India, Bangladesh, Nepal, Sri Lanka and Mauritius) and Southeast Asia. Traditionally it is a bright dot of red colour applied in the centre of the forehead close to the eyebrows, but it can also consist of other colours with a sign or piece of jewelry worn at this location.

Traditionally, the area between the eyebrows (where the bindi is placed) is said to be the sixth chakra, ajna, the seat of "concealed wisdom".