American Tract Society Bible Dictionary
An ingredient of the sacred incense, whose fragrance perfumed the sanctuary alone, Exodus 30:34 . It is conjectured to mean the Blatta Bryzantina of the shops; an article which consists of the cover or lid of a species of muscle, and when burnt emits a musky odor. The best onycha is found in the Red Sea, and is white and large.
These files are public domain and are a derivative of the topics are from American Tract Society Bible Dictionary published in 1859.
Rand, W. W. Entry for 'Onycha'. American Tract Society Bible Dictionary. https://www.studylight.org/dictionaries/eng/ats/o/onycha.html. 1859.