What means
It is one piece of a large-letter font.
HP's 2640 terminals used this piece in an optional Large Character set. A terminal is a keyboard-and-screen system. HP's character-generation manual is dated October 1975; its 1978 reference manual says the set built letters three times normal size from smaller pieces.
In 2021, Unicode mapped it to HP's Large Character entry 03 for legacy-text compatibility and text-mode graphics. Its job remains structural: a fragment used to draw larger letters.
Don't confuse it with
1Questions people ask
1Why does show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type
𜸜\1CE1CCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
