Reading of 孒 as ひだりのうでがない


According to [jisho](http://jisho.org/search/%E5%AD%92%20%23kanji), one of the
kun'yomi readings for the character 孒 is 「ひだりのうでがない」. This feels like it is
not an official reading, but is that reading ever used in conjunction with
this kanji? It feels like a humorous descriptive for the shape of the kanji,
but is there any basis for it?




Some people believe many kanji have this type of lengthy and descriptive kun-
readings. See: [長訓読み](http://www.akatsukinishisu.net/kanji/nagakun/) and
[訓読みが長い漢字](https://enpedia.rxy.jp/wiki/%E8%A8%93%E8%AA%AD%E3%81%BF%E3%81%8C%E9%95%B7%E3%81%84%E6%BC%A2%E5%AD%97).
There's also a [song by Hatsune Miku](https://youtu.be/__Qo8tFxlGo).

Many webpages say these weird readings are basically based on the 字訓索引 ("kun-
reading Index") of [大漢和辞典](https://en.wikipedia.org/wiki/Dai_Kan-Wa_Jiten),
probably the largest kanji dictionary ever published in Japan. The longest
"kun-reading" in the kun index of this dictionary is ほねとかわとがはなれるおと for 砉. I
don't own this dictionary and cannot check if ひだりのうでがない exists for 孒, but if
it does, it might be called "official" and "authoritative".

In reality, these strange "kun-readings" were listed in the index of course
only for convenience sake. See the [discussion
here](http://d.hatena.ne.jp/hakuriku/20040317#p1). I believe no one have read
this kanji as such seriously.




Some people believe many kanji have this type of lengthy and descriptive kun-
readings. See: [長訓読み](http://www.akatsukinishisu.net/kanji/nagakun/) and
[訓読みが長い漢字](https://enpedia.rxy.jp/wiki/%E8%A8%93%E8%AA%AD%E3%81%BF%E3%81%8C%E9%95%B7%E3%81%84%E6%BC%A2%E5%AD%97).
There's also a [song by Hatsune Miku](https://youtu.be/__Qo8tFxlGo).

Many webpages say these weird readings are basically based on the 字訓索引 ("kun-
reading Index") of [大漢和辞典](https://en.wikipedia.org/wiki/Dai_Kan-Wa_Jiten),
probably the largest kanji dictionary ever published in Japan. The longest
"kun-reading" in the kun index of this dictionary is ほねとかわとがはなれるおと for 砉. I
don't own this dictionary and cannot check if ひだりのうでがない exists for 孒, but if
it does, it might be called "official" and "authoritative".

In reality, these strange "kun-readings" were listed in the index of course
only for convenience sake. See the [discussion
here](http://d.hatena.ne.jp/hakuriku/20040317#p1). I believe no one have read
this kanji as such seriously.

