Firdsocne
Defined in 3 dictionaries — Black's (1910), Black's (1891), Burrill (1850)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Sav.
In old English law. Exemption from military service. Speiman.
A Dictionary of Law
Henry Campbell Black · 1891
Sax.
In old English law. Exemption from military seryice. Spelman,
A New Law Dictionary and Glossary
Alexander M. Burrill · 1850
Sax. [from fird, military service, and socne, liberty.] In old English law. Exemption from military service. Spelman.