Rachialgia

from The Collaborative International Dictionary of English v.0.48

Rachialgia \Ra`chi*al"gi*a\ (r[=a]`k[i^]*[a^]l"j[i^]*[.a]), n.
   [NL., fr. Gr. "ra`chis backbone + 'a`lgos pain.] (Med.)
   A painful affection of the spine; especially, {Pott's
   disease}; also, formerly, lead colic.
   [1913 Webster]