from The Century Dictionary and Cyclopedia
- n. An oxid which contains less oxygen than the protoxid.
Sorry, no etymologies found.
"In the mouth, a suboxid is more likely to be formed than a protoxid, but both are black; sulfur and oxygen are capable of acting on tin under favorable circumstances, such as warmth, moisture, full contact, condensation of elements, and their nascent conditions; the first three are always present in the mouth.
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