Search the Dictionary

Webster’s Dictionary (1828)

98,828 entries. Headwords are matched first, then definition text.

3 words match “PENTOXIDE”

PENTOXIDE n.
An oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide, P2O5.
NITRIC a.
idizer. -- Nitric anhydride, a white crystalline oxide of nitrogen (N2O5), called nitric pentoxide, and regarded as the anhydride of nitric acid. -- Nitric oxide, a colorless poisous gas (NO) obtained by treating nitric acid with copper. On contact with the air or with oxygen, it becomes reddish brown from the format…
PENTA- n.
e degree of five, either as regards quality, property, or composition; as, pentasulphide; pentoxide, etc. Also used adjectively.