I see Unicode expresses the character symbols as simply '[BLACK] UP-POINTING TRIANGLE' etc, but are there any single-word or 'catchier' terms for these orientations of triangles?
▲ △ -- up-pointing (U+25b2 and U+25b3)
▼ ▽ -- down-pointing (U+25bc and U+25bd)
It is to be used inside a figure caption, and the symbols represent location markers on a map. I use up and down-pointing triangles for the simple reason that I can overlay them, and produce a third symbol (6-pointed star) very easily.
I suppose I could do the same with a square and a diamond, and wouldn't have to think up a new word!