Source : Webster's Revised Unabridged Dictionary (1913)

Orthotone \Or"tho*tone\, a. [Ortho- + Gr. ? tone, accent.] (Gr.
   Gram.)
   Retaining the accent; not enclitic; -- said of certain
   indefinite pronouns and adverbs when used interrogatively,
   which, when not so used, are ordinarilly enclitic.