Dolor | Webster's Dictionary of the English Language

dolor
dŏlor, ōris, m. [doleo], pain, smart, ache (freq. and class.; for syn. cf.: aegrimonia, maeror, maes...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
dolor
dolor ōris, m DAL-, pain, smart, ache, suffering, anguish : Laborat e dolore, T.: differor dolorib...

An Elementary Latin Dictionary