siderography (siderografi)
The Century Dictionary and Cyclopedia · 1897 · p. 41
[ to unity minus the quotient of the yearly prece ion by siderolite (sid'e-ro-lit), n. [ 360°-that is, it is longer than the tropical year by 20m. 23.3s.; its length is thus 365 days 6 hours 9 minutes 9.5 seconds.
Readham'da tam maddeyi gor →