backbone
A Dictionary of Aviation · 1911 · p. 6
‘bek,boon m. [also spelt back-bone] the main support or axis; the chief substantial part, as of a dirrgible; a rigid red connecting the cells of a cellular kite.
Bu kavram başka kaynaklarda da geçiyor
Appleton's Medical Dictionary (1913)
The American Dictionary and Cyclopedia (1910)
Chamber's Etymological of the English Language (1895)
An Illustrated Encyclopaedic Medical Dictionary (1891)
Readham'da tam maddeyi gor →