In the 1934 Websters the word "Dord" appeared defined as "density".
It has never again appeared in any English dictionary anywhere.
What had happened was that someone had made a note on an entry slip (all pen and paper in those days) which was intended to aply to "D" as an abbreviation and read:
D =density
Someone else realised that the lower case letter was also used, so the slip was replaced by one which read:
D or d =density
And an overworked compositor correctly set:
D or d =density
but an equally overworked proof reader corrected this to
Dord =density
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