ϩⲟⲥⲙ, ϩⲟⲥⲏⲙ, ϩⲟⲥⲙⲉ S (ⲡ)
ϩⲟⲥⲉⲙ B (ⲡ)
ϩⲁⲥⲙ SF (ⲡ)
ϩⲱⲥⲉⲙ SSf (ⲡ)
(noun male)
natron (carbonate of soda) [νιτρον, ποια]
Crum: 713a
Dawoud: 698a

https://www.mindat.org/imagecache/1b/26/01911190016014944084682.jpg
https://upload.wikimedia.org/wikipedia/commons/4/48/Emi_Koussi_crater_natron.jpg
complete

See also:
view ϧⲁⲓ B (noun) nitre
Crum: 713a
713

Dawoud: 698a
698