voluntary
The American Illustrated Medical Dictionary · 1913 · p. 26
(vol’un-ta-re) [L. volun’tas will). complished in accordance with the will.
Bu kavram başka kaynaklarda da geçiyor
Chamber's Twientieth Century Dictionary (1908)
An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
The Handy Cyclopedia of Common Things and Biographical Dictionary (1901)
Pears Shilling Cyclopedia (1898)
The Student's Medical Dictionary (1896)
An Illustrated Encyclopedic Medical Dictionary (1894)
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