• Webster's Revised Unabridged Dictionary
    • a Osmic (Chem) Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide.
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Century Dictionary and Cyclopedia
    • osmic In chem., pertaining to or obtained from osmium: as, osmic acid (H2OsO4).
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In literature:

The metal osmium, if exposed to the flame of oxidation, fuses and is finally dissipated as osmic acid.
"A System of Instruction in the Practical Use of the Blowpipe" by Anonymous
Osmic acid, 1 per cent.
"The Elements of Bacteriological Technique" by John William Henry Eyre
These ciliated furrows stain deeply with osmic acid, and nervous impulses are certainly transmitted along them.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
This is an especially marked feature of preparations made with osmic acid.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour

In science:

In practice, the resulting χ2 -values need to be normalised to a plausible scale, since the raw values obtained are enlarged artificially due to the discrete sampling of the library and c osmic variance.
Object Classification in Astronomical Multi-Color Surveys