What 蚾 means
It has an insect reading and appears in an old toad name.
In Mandarin, pí (approximately “pee” with a rising tone) is glossed as an insect; used alone, this reading is obsolete in modern Standard Chinese. The reading bǒ (approximately “bo” with a low, dipping tone) occurs in 蚵蚾, an old name for a toad.
蚾 is recorded in 玉篇, a Chinese character dictionary compiled in 543; it is absent from 說文解字, another early character dictionary. The later 本草綱目, a Chinese reference book on medicines and natural history, lists 蚵蚾 among names for the toad 蟾蜍 and connects the name to the animal’s rough skin.
Archaic and lexicographic; best suited to historical or dictionary contexts.
A box in place of 蚾 means the font lacks this glyph.
Questions people ask
1Why does 蚾 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 蚾
蚾\86BECodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.